Combustion & Electrolyzer fixes (#3202)

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## About The Pull Request
Hydrogen now burns with the correct (I think) enthalpy, making hydrogen
TEGs viable. yay!
Komodo, Skipper, and Inkwell get instruction sheets. Crying-sun had one
and the upcoming dwayne remap adds one.
Electrolyzers now try to link when ice goes in instead of on init, which
caused certain maps to not connect.
Electrolyzer multitool linking works now.
Merits can no longer turn into a magic 0 value slip.
Replaces nt_ice passive pumps with volume pumps
(skipper keeps hydrogen, the commits lie)

Hydrogen pumps not correctly connecting to the pipenet even when the
Other recent map bug isn't in effect is still an issue, but I've got no
idea how to fix it. Leaving it as an issue for now.

fixed single wrong pixel on the sprite.
new

![image](https://github.com/user-attachments/assets/575e4ef0-5f29-4fc8-bbf6-cc2d57eb28c4)
old

![image](https://github.com/user-attachments/assets/2165bc33-f260-41ab-934d-3f6a90062277)

<!-- Describe The Pull Request. Please be sure every change is
documented or this can delay review and even discourage maintainers from
merging your PR! -->

## Why It's Good For The Game
#2431 needed more testing, especially since it was an early PR of mine.
Fixes some of my mistakes.
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benefit the game. If you can't justify it in words, it might not be
worth adding. -->

## Changelog

:cl:
fix: hydrogen and combustion bugs
/:cl:

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your name to the right of the first :cl: if you want to overwrite your
GitHub username as author ingame. -->
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icon ingame) and delete the unneeded ones. Despite some of the tags,
changelogs should generally represent how a player might be affected by
the changes rather than a summary of the PR's contents. -->

_maps/outpost/hangar/nt_ice_20x20.dmm

@@ -837,7 +837,7 @@
 /obj/effect/turf_decal/siding/white/corner{
 	dir = 4
 	},
-/obj/machinery/atmospherics/components/binary/pressure_valve,
+/obj/machinery/atmospherics/components/binary/volume_pump,
 /turf/open/floor/plasteel/patterned/brushed{
 	light_color = "#1B1D2E";
 	light_range = 2;

_maps/outpost/hangar/nt_ice_40x20.dmm

@@ -305,7 +305,7 @@
 /obj/effect/turf_decal/siding/white/corner{
 	dir = 4
 	},
-/obj/machinery/atmospherics/components/binary/pressure_valve,
+/obj/machinery/atmospherics/components/binary/volume_pump,
 /turf/open/floor/plasteel/patterned/brushed{
 	light_color = "#1B1D2E";
 	light_range = 2;

_maps/outpost/hangar/nt_ice_40x40.dmm

@@ -1398,7 +1398,7 @@
 /obj/effect/turf_decal/siding/white/corner{
 	dir = 4
 	},
-/obj/machinery/atmospherics/components/binary/pressure_valve,
+/obj/machinery/atmospherics/components/binary/volume_pump,
 /turf/open/floor/plasteel/patterned/brushed{
 	light_color = "#1B1D2E";
 	light_range = 2;

_maps/outpost/hangar/nt_ice_56x20.dmm

@@ -322,20 +322,6 @@
 	planetary_atmos = 1
 	},
 /area/hangar)
-"hD" = (
-/obj/effect/turf_decal/siding/white{
-	dir = 1
-	},
-/obj/machinery/atmospherics/components/binary/volume_pump{
-	dir = 4
-	},
-/obj/effect/turf_decal/industrial/shutoff,
-/obj/structure/railing{
-	dir = 1;
-	layer = 2.8
-	},
-/turf/open/floor/plasteel/tech,
-/area/hangar)
 "if" = (
 /obj/machinery/door/airlock/outpost,
 /obj/machinery/atmospherics/pipe/simple/yellow/hidden,
@@ -934,7 +920,7 @@
 /obj/effect/turf_decal/siding/white/corner{
 	dir = 4
 	},
-/obj/machinery/atmospherics/components/binary/pressure_valve,
+/obj/machinery/atmospherics/components/binary/volume_pump,
 /turf/open/floor/plasteel/patterned/brushed{
 	light_color = "#1B1D2E";
 	light_range = 2;
@@ -3996,7 +3982,7 @@ Hr
 ag
 yh
 nD
-hD
+TK
 AZ
 Vu
 OZ

_maps/outpost/hangar/nt_ice_56x40.dmm

@@ -443,7 +443,7 @@
 /obj/effect/turf_decal/siding/white/corner{
 	dir = 4
 	},
-/obj/machinery/atmospherics/components/binary/pressure_valve,
+/obj/machinery/atmospherics/components/binary/volume_pump,
 /turf/open/floor/plasteel/patterned/brushed{
 	light_color = "#1B1D2E";
 	light_range = 2;
@@ -1185,20 +1185,6 @@
 	planetary_atmos = 1
 	},
 /area/hangar)
-"Eo" = (
-/obj/effect/turf_decal/siding/white{
-	dir = 1
-	},
-/obj/machinery/atmospherics/components/binary/volume_pump{
-	dir = 4
-	},
-/obj/effect/turf_decal/industrial/shutoff,
-/obj/structure/railing{
-	dir = 1;
-	layer = 2.8
-	},
-/turf/open/floor/plasteel/tech,
-/area/hangar)
 "Eu" = (
 /obj/structure/catwalk/over/plated_catwalk,
 /obj/machinery/atmospherics/pipe/simple/orange/hidden,
@@ -5258,7 +5244,7 @@ tj
 aH
 Zj
 qN
-Eo
+AW
 pa
 Od
 aK

_maps/shuttles/nanotrasen/nanotrasen_skipper.dmm

@@ -440,6 +440,7 @@
 /area/ship/hallway/central)
 "dO" = (
 /obj/machinery/atmospherics/components/trinary/mixer/flipped/layer4,
+/obj/item/paper/guides/jobs/engi/combustion_thruster,
 /turf/open/floor/plasteel/tech,
 /area/ship/engineering/atmospherics)
 "dS" = (
@@ -3365,9 +3366,6 @@
 /obj/structure/cable{
 	icon_state = "1-2"
 	},
-/obj/item/paper/crumpled{
-	default_raw_text = "66% Oxy (Node 1) to 34% Plasma (Node 2) works great at 500 kPa."
-	},
 /obj/machinery/atmospherics/components/binary/pump{
 	dir = 8;
 	name = "engine fuel pump"

_maps/shuttles/solgov/solgov_inkwell.dmm

@@ -2282,6 +2282,7 @@
 	dir = 4;
 	name = "Fuel Mixer"
 	},
+/obj/item/paper/guides/jobs/engi/combustion_thruster,
 /turf/open/floor/plasteel/tech,
 /area/ship/maintenance/starboard)
 "oH" = (

_maps/shuttles/syndicate/syndicate_gorlex_komodo.dmm

@@ -2475,6 +2475,7 @@
 /obj/machinery/atmospherics/components/trinary/mixer/flipped{
 	dir = 1
 	},
+/obj/item/paper/guides/jobs/engi/combustion_thruster,
 /turf/open/floor/plasteel/tech,
 /area/ship/engineering)
 "wJ" = (

code/game/machinery/outpost_electrolyzer.dm

@@ -38,16 +38,6 @@
 
 	var/obj/machinery/mineral/electrolyzer/linked_electrolyzer
 
-/obj/machinery/computer/electrolyzer_console/Initialize()
-	. = ..()
-	find_electrolyzer()
-
-/obj/machinery/computer/electrolyzer_console/proc/find_electrolyzer()
-	for(var/obj/machinery/mineral/electrolyzer/potential in oview(3,src))
-		if(linked_electrolyzer == null)
-			linked_electrolyzer = potential
-			potential.linked_console = src
-
 /obj/machinery/computer/electrolyzer_console/proc/electrolyze_item(obj/item/I)
 	var/obj/item/stack/ore/ice/S = I
 	var/meritval = round(S.get_amount() * MERITS_PER_ICE * OUTPOST_HYDROGEN_CUT,1) // causes a bit of surplus in the "outpost" supply, even if they use all of these merits for hydrogen.
@@ -61,6 +51,7 @@
 		var/obj/item/multitool/multi = item
 		if(istype(multi.buffer, /obj/machinery/mineral/electrolyzer))
 			linked_electrolyzer = multi.buffer
+			linked_electrolyzer.linked_console = src
 			visible_message("Linked to [linked_electrolyzer]!")
 		return
 	return ..()
@@ -88,7 +79,17 @@
 	)
 	AddElement(/datum/element/connect_loc, loc_connections)
 
-/obj/machinery/computer/electrolyzer_console/attackby(item,mob/user)
+/obj/machinery/mineral/electrolyzer/proc/find_electrolyzer()
+	if(linked_console)
+		return TRUE
+	for(var/obj/machinery/computer/electrolyzer_console/potential in oview(3,src))
+		if(linked_console == null)
+			linked_console = potential
+			potential.linked_electrolyzer = src
+			return TRUE
+	return FALSE
+
+/obj/machinery/mineral/electrolyzer/attackby(item,mob/user)
 	if(istype(item, /obj/item/multitool))
 		var/obj/item/multitool/multi = item
 		multi.buffer = src
@@ -108,6 +109,10 @@
 	INVOKE_ASYNC(src, PROC_REF(electrolyze), AM)
 
 /obj/machinery/mineral/electrolyzer/proc/electrolyze(atom/movable/electrolyze_target, sound=TRUE)
+	if(!find_electrolyzer())
+		visible_message("<span class='danger'>[src] doesn't have a linked console!</span>")
+		playsound(src, 'sound/machines/buzz-sigh.ogg', 50, FALSE, 1)
+		return
 	if(istype(electrolyze_target, /obj/effect) || !linked_console || !isturf(electrolyze_target.loc) || (machine_stat & (BROKEN|NOPOWER)))
 		return
 	if(!istype(electrolyze_target, /obj/item/stack/ore/ice))
@@ -448,34 +453,36 @@
 	return ..()
 
 /obj/item/merit/bundle/attack_self(mob/user)
+	if(!Adjacent(user))
+		to_chat(user, "<span class='warning'>You need to be in arm's reach for that!</span>")
+		return
+
 	var/cashamount = input(user, "How many merits do you want to take? (0 to [value])", "Take Merits", 20) as num
 	cashamount = round(clamp(cashamount, 0, value))
 	if(!cashamount)
 		return
 
-	if(!Adjacent(user))
-		to_chat(user, "<span class='warning'>You need to be in arm's reach for that!</span>")
-		return
-
 	value -= cashamount
 	if(!value)
 		user.dropItemToGround(src)
 		qdel(src)
 
 	var/obj/item/merit/bundle/bundle = new (user.loc)
 	bundle.value = cashamount
+	bundle.update_appearance()
+	user.put_in_hands(bundle)
 	update_appearance()
 
 /obj/item/merit/bundle/AltClick(mob/living/user)
+	if(!Adjacent(user))
+		to_chat(user, "<span class='warning'>You need to be in arm's reach for that!</span>")
+		return
+
 	var/cashamount = input(user, "How many merits do you want to take? (0 to [value])", "Take Merits", 20) as num
 	cashamount = round(clamp(cashamount, 0, value))
 	if(!cashamount)
 		return
 
-	else if(!Adjacent(user))
-		to_chat(user, "<span class='warning'>You need to be in arm's reach for that!</span>")
-		return
-
 	value -= cashamount
 	if(!value)
 		user.dropItemToGround(src)

code/modules/atmospherics/auxgm/gas_types.dm

@@ -165,5 +165,6 @@
 	color = "#ffe"
 	fusion_power = 0
 	fire_products = list(GAS_H2O = 1)
+	enthalpy = FIRE_HYDROGEN_ENERGY_RELEASED
 	fire_burn_rate = 2
 	fire_temperature = FIRE_MINIMUM_TEMPERATURE_TO_EXIST - 50

tgui/packages/tgui/constants.ts

@@ -239,7 +239,7 @@ const GASES = [
     color: 'paleturquoise',
   },
   {
-    id: 'hydrogen',
+    id: 'h2',
     path: '/datum/gas/hydrogen',
     name: 'Hydrogen',
     label: 'H₂',