Carrier Z6, ZN030-105, ZW, 48ZT, Z8075-105 Gas Piping Details, 48Z Series Staged Gas Implementation

*NPT plug is field supplied. NOTE: Follow all local codes.

Fig. 58 — Gas Piping Details

Installing Flue/Inlet Hoods — The flue and inlet hoods are shipped in a package taped to the basepan in the fan section. The flue (outlet) hoods are pre-assembled. The flue de- flector and inlet hoods require assembly.

The hoods are located on the heating section access panel as shown in Fig. 59 (sizes 030-050) or Fig. 60 (sizes 055-105). See Table 18 for a list of parts used to assemble each hood and quantities of each hood type used with each unit.

1.Remove shipping block-offs and shipping tape from all openings in the access panel.

2.Attach flue outlet hoods (see Fig. 61) to access panel us- ing screws provided. Hoods are placed over each com- bustion outlet.

3.Install flue deflector baffle inside flue deflector hood. See Fig 62 for sizes 030-050 and 075-105 (V-type deflector). See Fig. 63 for sizes 055-105 (curve-type deflector). In- stall flue deflector hood assembly over each flue outlet hood (installed in Step 2). Observe the offset mounting hole locations in the deflector hood flanges when attach- ing hood to panel (see Fig. 64). Holes in the mounting flange must be at the bottom when attached.

4.Inlet hoods are shipped unassembled and must be assem- bled on the access panel (see Fig. 65). Flanges of the hood top and sides should be placed on the inside of the access panel openings. Install hood top and sides with screws provided. Attach speed clips to screen and insert screen into bottom opening of hood. Secure with 3 screws. On large inlet hoods, attach viewport cover over opening in hood (see Fig. 66). Secure with two screws.

Supply-Air Thermistors (Staged Gas Units Only) — Supply-air thermistors are a field-installed, factory- provided component. Three supply-air thermistors are shipped with staged gas units inside the heating section. Thermistor wires must be connected to SGC in the heating section. See Table 19. The supply-air thermistors should be located in the supply duct with the following criteria:

•downstream of the heat exchanger cells

•equally spaced as far as possible from the heat exchanger cells

•a duct location where none of the supply air thermistors are within sight of the heat exchanger cells

•a duct location with good mixed supply air portion of the unit.

Table 17 — 48Z Series Staged Gas Implementation

NO. OF		MODEL NUMBER POSITION					POINT			HEAT
STAGES	3	5	6,7,8	10	HTSTGTYP	CAPMXSTG		LIMTHIHT	LIMTLOHT	SIZE
2 stages	Z	H, K, W, Y	030	ALL	Default=0	Default=45		Default=170 F	Default=160 F	Low
			035
			040
			050
5 stages	Z	J, L, X, Z	030	ALL	Default=1	Default=20		Default=170 F	Default=160 F	High
			035
			040
			050
		H, K, W, Y	055	ALL	Default=1	Default=20		Default=135 F	Default=125 F	Low
			060
			070
		H, K	075	-,A,B,C,D,E	Default=1	Default=20		Default=135 F	Default=125 F
			090
				G,H,J,K,L,M	Default=1	Default=20		Default=130 F	Default=120 F
			105
9 stages	Z	J, L, X, Z	055	ALL	Default=3	Default=15		Default=135 F	Default=125 F	High
			060
			070
		J, L	075	-,A,B,C,D,E	Default=3	Default=15		Default=135 F	Default=125 F
			090
				G,H,J,K,L,M	Default=3	Default=15		Default=130 F	Default=120 F
			105
		LEGEND
CAPMXSTG	— Maximum Capacity per Changes
HTSTGTYP	—	Heat Stage Type
LIMTHIHT	— Limit Switch Thermistor High Temperature
LIMTLOHT	—	Limit Switch Thermistor Low Temperature

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