Page 3 - pUMP; «Separate fused disconnect required for electric heater.; Fig. 3 — Typical Installation; Condensate; Drain Connection
— POWER WIRING ------- CONTROL WIRING OUTDOOR air flow INDOOR AIR FLOW pUMP «Separate fused disconnect required for electric heater. Fig. 3 — Typical Installation COOLING CYCLE CONDENSATE DISPOSAL Condensate may be drained directly onto gravel apron or connected by drain line(s) to a dry well Conden...
Page 4 - Medium; Med ium; F a n
ELECTRICAL DATA AND WIRING Field wiring must comply with local and national fire, safety and electrical codes. Voltage to unit must be within ±10% of voltage indicated on nameplate. On 3-phase units, phases must be balanced within 2%. Operation of unit on improper line voltage or ; with e.xcessive p...
Page 5 - Fig. 6 — Line Power Connections; UNIT CONTROL; — Heater Relay; S E Q; — Sequencer; Fig. 7 — Control Circuit Connections
The 50MQ unit transformer supplies 24-v power for complete system including accessory electric heater up to 10 kw. Electric heaters over 10 kw are equipped with 24-v transformer used to power heater controls. GROUND LUG (IN SPLICE BOX) Fig. 6 — Line Power Connections HH07AT070 THERMOSTAT HH93AZ076 S...
Page 7 - STRAINERS; Fig. 8 — 50MQ Refrigerant Flow Diagrams; »Factory refrigerant charge.; REFRIGERANT CHARGING
strainers STRAINERS Unit Piping Fig. 8 — 50MQ Refrigerant Flow Diagrams SERVICE Table 4 — Service Data U N I T R - 2 2 C H G ( I b - o z ) * R e f r i g C o n t r o l I N D O O R F A N R p mD i a m e t e r ( i n . ) W i d t h ( i n . ) R a n g e C f m M o t o r H p O U T D O O R F A N C f m R p m D ...
Page 9 - Fig. 10 — Component Location; FANBLAOe; MOTOR; Fig. 11 — Outdoor Fan Position
FAN MOTOR BEARINGS are prelubricated for 3 years heavy duty or 5 years normal duty. When lubrication is necessary, send motor to authorized motor repair shop. Evaporator (Indoor Coil) CAUTION: Before performing recommended ; maintenance, be sure main power switch to unit is turned off. COIL ” Lift o...
Page 10 - TROUBLESHOOTING CHART - COOLING CYCLE
Page 11 - TROUBLESHOOTING CHART - HEATING CYCLE; CONTACTOR; DEFECTIVE ROOM
TROUBLESHOOTING CHART - HEATING CYCLE NO HEATING OR INSUFFICIENT HEATING CONTACTOR OPEN OPENING IN POWER CIRCUIT DEFECTIVE LOW VOLTAGE TRANSFORMER REMOTE CONTROL CENTER DEFECTIVE CONTROL RELAY COIL OR CONTACTS DEFECTIVE COMPRESSOR WILL NOT RUN COMPRESSOR RUNS BUT CYCLES ON COMPRESSOR RUNS - INSUFFIC...
Page 12 - For replacement items use Carrier Specified Parts.; Codes D and MS
For replacement items use Carrier Specified Parts. Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Tab 12 Form50MQ-1SI New Printed in U.S.A. 12-74 Codes D and MS Catalog No 535-070