Carrier 48/50AJ specifications Staged Gas Heat 48A2,A3,A4,A5 Units, Relay Output Stage

Table 69B — Staged Gas Heat — 48A2,A3,A4,A5 Units

UNIT SIZE	HEAT CAPACITY			UNIT MODEL NO.				Configuration→HEAT→SG.CF →HT.ST
				POSITION NO. 5				ENTRY VALUE
020-030		Low			S		1 =			5 STAGE
		High			T		2 =			7 STAGE
035-050		Low			S		1 =			5 STAGE
		High			T		1 =			5 STAGE
060		Low			S				4 = 11 STAGE
		High			T		3 =			9 STAGE
Table 70 — Staged Gas Heat Control Steps (Configuration→HEAT→SG.CF→HT.ST = 1)
				RELAY OUTPUT
STAGE	Heat 1		Heat 2	Heat 3		Heat 4		Heat 5		Heat 6	CAPACITY
	MBB-RLY8		MBB-RLY7	SCB-RLY1		SCB-RLY2		SCB-RLY3		SCB-RLY4	%
	IGC1		MGV1	IGC2		MGV2		IGC3		MGV3
0	OFF		OFF	OFF		OFF		OFF		OFF	0
1	ON		OFF	OFF		OFF		OFF		OFF	37
2	ON		ON	OFF		OFF		OFF		OFF	50
3	ON		OFF	ON		OFF		OFF		OFF	75
4	ON		ON	ON		OFF		OFF		OFF	87
5	ON		ON	ON		ON		OFF		OFF	100
Table 71 — Staged Gas Heat Control Steps (Configuration→HEAT→ SG.CT→HT.ST = 2)
				RELAY OUTPUT
STAGE	Heat 1		Heat 2	Heat 3		Heat 4		Heat 5		Heat 6	CAPACITY
	MBB-RLY8		MBB-RLY7	SCB-RLY1		SCB-RLY2		SCB-RLY3		SCB-RLY4	%
	IGC1		MGV1	IGC2		MGV2		IGC3		MGV3
0	OFF		OFF	OFF		OFF		OFF		OFF	0
1	ON		OFF	OFF		OFF		OFF		OFF	25
2	ON		ON	OFF		OFF		OFF		OFF	33
3	OFF		OFF	ON		OFF		OFF		OFF	50
4	OFF		OFF	ON		ON		OFF		OFF	67
5	ON		OFF	ON		OFF		OFF		OFF	75
6	ON		ON	ON		OFF		OFF		OFF	83
7	ON		ON	ON		ON		OFF		OFF	100
Table 72 — Staged Gas Heat Control Steps (Configuration→HEAT→ SG.CT→HT.ST = 3)
				RELAY OUTPUT
STAGE	Heat 1		Heat 2	Heat 3		Heat 4		Heat 5		Heat 6	CAPACITY
	MBB-RLY8		MBB-RLY7	SCB-RLY1		SCB-RLY2		SCB-RLY3		SCB-RLY4	%
	IGC1		MGV1	IGC2		MGV2		IGC3		MGV3
0	OFF		OFF	OFF		OFF		OFF		OFF	0
1	ON		OFF	OFF		OFF		OFF		OFF	25
2	ON		ON	OFF		OFF		OFF		OFF	33
3	ON		OFF	ON		OFF		OFF		OFF	50
4	ON		ON	ON		OFF		OFF		OFF	58
5	ON		ON	ON		ON		OFF		OFF	67
6	ON		OFF	ON		OFF		ON		OFF	75
7	ON		OFF	ON		ON		ON		OFF	83
8	ON		ON	ON		ON		ON		OFF	92
9	ON		ON	ON		ON		ON		ON	100

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