Manual de instrucciones de Bryant 394HAD

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CANADIAN GAS ASSOCIATION
service and
394HAD
396HAD
maintenance procedures
GAS-FIRED
Series C
INDUCED-COMBUSTION FURNACES
Cancels: SP04-13 SP04-19
11-1-93
NOTE: Read the entire instruction manual before starting the
installation.
→Theseproceduresareforsizes65,000through150,000Btuhunits.
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Index Page
A PP R O VED
R
SAFETY CONSIDERATIONS.....................................................1
CARE AND MAINTENANCE..................................................1-5
Air Filter Arrangement.....

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WARNING: Turn off the gas and electrical supplies to WARNING: Never operate unit without a filter or with the unit before performing any maintenance or service. filter access door removed. A failure to follow this Follow the operating instructions on the label attached to warning could result in fire, personal injury, or death. the furnace. A failure to follow this warning could result in personal injury. 1. Downflow Each furnace requires 2 filters which are installed in the return-air duct. (Se

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MOUNTING SCREWS DRAFT SAFEGUARD SWITCH AUXILIARY LIMIT SWITCH FLUE RELIEF SPEED (NOT VISIBLE) COLLECTOR BOX SELECTOR BOX VENT PIPE ENCLOSURE GAS MOUNTING VALVE SCREWS CONTROL PILOT BOX DRAFT CONTROL SAFEGUARD BOX RELIEF SWITCH SPEED BOX SELECTOR FLUE FILTER COLLECTOR RETAINER BOX WASHABLE FILTER A92178 A92179 Fig. 4—Model 394HAD Upflow Fig. 5—Model 396HAD Downflow b. Remove blower and control access doors. 3. Disconnect wires from auxiliary limit on blower housing (downflow

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b. Remove screws holding cutoff plate and remove cutoff a. Assemble wire brush and steel spring cable. plate from housing. (1.) Use 48 in. of 1/4-in. diameter high-grade steel c. Lift blower wheel from housing through opening. spring cable (commonly known as drain clean-out or Roto- Rooter cable). 14. Cleanblowerwheelandmotorusingavacuumcleanerwith soft brush attachment. Do not remove or disturb balance (2.) Use 1/4-in. diameter wire brush (commonly known weights (clips) on blower wheel blades.

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12. Reconnect wires to the following components: PILOT HEAD V–NOTCH FALLS DIRECTLY BELOW FRONT EDGE a. Draft safeguard switch OF BURNER CARRYOVER. b. Inducer motor c. Pressure switch d. Limit overtemperature switch e. Gas valve f. Edge connector leading to control box 1 / ″ 8 13. Reconnect vent pipe to relief box. Replace vent pipe enclosure (downflow furnace only). 14. Replace blower access door only and secure with 2 screws (downflow furnace only). 15. Turn on electrical power and ga

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FIELD 24-VOLT WIRING FIELD 115-, 208/230-, 460-VOLT WIRING FACTORY 24-VOLT WIRING FACTORY 115-VOLT WIRING THERMOSTAT W R G Y FOUR FIELD-SUPPLIED TERMINALS WIRE FUSED DISCONNECT TWO-WIRE 208/230- OR HEATING- 460-VOLT ONLY THREE PHASE W BLK BLK R WHT WHT 208/230- VOLT GND GND G SINGLE AUXILIARY 115-VOLT FIELD- PHASE J-BOX C GND SUPPLIED CONTROL FUSED CONDENSING Y BOX DISCONNECT UNIT TWO 24-VOLT NOTE: If any of the original wire, WIRE TE

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—7— GV CONNECTION L1 L2 TO 115V AC FIELD DISCONNECTIONS SCHEMATIC DSS DIAGRAM PRS NOTE #5 DIAGRAM MGV TR TH BRN NO ILK C EQUIPMENT GROUND NC PL2 PILOT HFR CFR LO L1 4 L2 3 MED LO 2 MED HI NOTE#10 FL 1 HI ALS LS C COM BLWM COM PL4 (WHEN USED) NOTE#4 NOTE #7 EAC-2 EAC-1 CAP IDR WHT PL1-3 IDM BLK PL1-1 IDM BLU PR-1 PR-2 115VAC TRAN LS FL ALS FU1 FUSED DISCONNECT TRAN PL1-4 ILK SWITCH (WHEN REQ'D) NOTE #5 3A 24VAC PL2 PL1-7 SEC-1 SEC-2 FUSE 1 (WHEN USED) BLK BLK NOTE#8 FU2 NOTE #7 2 WHT WHT

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START Turn on 115-VAC Disconnect all thermostat Turn off 115-VAC power to unit. wires from board. power to unit. NO Are Is 24VAC Is 24VAC all thermostat YES YES YES Is blower across screws across screws wires to board running? W & C or R & C? disconnected? G & C? NO NO NO YES Check/Replace: 1. Limit switch Jumper across Replace 2. Limit shield (if used) screws R & G. board. 3. Fuse link 4. Auxillary limit switch (if used) 5. Wire harness YES Is Is Is Is NO NO YES 24VAC bl