McQuay RAH 047C Installation And Maintenance Manual page 60

Wiring Diagrams
ID Description
M41–50 Contactor, electric heat (bot.
bank)
M60 Contactor, energy recovery
wheel
MCB Microprocessor circuit board
MJ Mechanical Jumper
MMP1–8 Manual motor protector, com-
pressors
MMP10 Manual motor protector, sup-
ply fan
MMP11– Manual motor protector, cond.
18 fans, ckt#1
MMP20 Manual motor protector, return
fan
MMP21– Manual motor protector, cond.
28 fans, ckt#2
MMP30 Manual motor protector, invrtr.
bypass, sup. fan
MMP40 Manual motor protector, invrtr.
bypass, ret. fan
MMP51, Manual motor protector, ex-
52, 53 haust fan(s)
MMP60 Manual motor protector, ener-
gy recovery wheel
MP1–6 Motor protector, compr.#1-6
OAE Outside air enthalpy sensor
OAT Outside air temperature sen-
sor
PB1, 2 Power block, power distribu-
tion
PB3 Power block, power distribu-
tion, electric heat
PB9, 10 Power block, supply fan
PB11, 12 Power block, power distribu-
tion
PB19, 20 Power block, return/exhaust
fan
PC5 Pressure control, clogged filter Pre filter section
PC6 Pressure control, clogged final
filter
PC7 Pressure control, proof airflow Supply fan section
PC8 Pressure control, minimum
airflow
PM1 Phone modem
PVM1, 2 Phase voltage monitor
R20 Relay, Heat, gas/ steam/ hot
water
R21, 22 Relay, heat, gas (hi-turn
down)
R23 Relay, heat, gas & electric
R24 Relay, heat alarm, gas
R25 Relay, heat, gas, start supply
fan inverter
R26 Relay, isol/exh. dampers,
open/close
R28 Relay, isolation damper, safe-
ty
R29 Relay, remote fire alarm
R30 Relay, cool valve with face by-
pass
R45 Relay, UV lights
R46, 47 Relay, supply fan inverter,
incr/decr
60
Standard location
Electric heat box
Main control box
Main control box
All control boxes
Main/cond. control box
Main control box
Main/cond. control box
Main control box
Main/cond. control box
Inverter bypass box
Inverter bypass box
Prop exhaust box
Main control box
On compressors
Economizer section
Economizer section
Main control box
Electric heat box
Junction box, split unit
Main control box
Junction box, split unit
Final filter section
Coil section, cool
Main control box
Main control box
Gas heat/main cont. box
Gas heat box
Gas/electric heat box
Main control box
Main control box
Main control box
Main control box
Main control box
Main control box
Main control box
Main control box
ID Description
R48, 49 Relay, return fan inverter, incr/
decr
R58,59 Relay, heat wheel inverter,
incr/decr
R60 Relay, energy recovery wheel,
enable
R61 Relay, smoke detector, dis-
charge air
R62, 63, Relay, use on specials
65
R66 Relay, smoke detector, return
air
R67 Relay, supply fan, enable
R68 Relay, return fan, enable
R69 Relay, Inv. bypass VAV box in-
terlock
R70–79 Relay, use on specials
RAE Return air enthalpy sensor
RAT Return air temperature sensor Return section
REC1 Receptacle, main box
REC3 Receptacle, field power, 115V Discharge bulkhead
REC10– Receptacle, cabinet sections Cabinet sections
23
S1 Switch, system on/off
S3 Switch, furnace on/off
S4 Switch, inverter bypass, on/ off Main control box
S7 Switch, local on/auto/off to
controller
S10–23 Switches, cabinet section
lights
S40–45 Switches, door interlock, UV
lights
SD1 Smoke detector, supply
SD2 Smoke detector, return
SPS1, 2 Static pressure sensors, duct/
building
SR1-3 Sequencing relays, electric
heat
T1 Transformer, main control
(line/115 V (ac)
T2 Transformer, control input
(115/24 V (ac)
T3 Transformer, control output
(115/24 V (ac)
T4 Transformer, exh. damper ac-
tuator (115/12 V (dc)
T5 Transformer, electric heat
T6 Transformer, dew point con-
troller (115/24 V (ac)
T9 Transformer, refrig. circuit 24V Main control box
TB1 Terminal block, internal
TB2 Terminal block, field
TB3 Terminal blocks, factory
TB4 Terminal block, RFS, field
TB7 Terminal block, 115V conve-
nience outlet, field
TB11 Terminal block, heat
TB25, 26, Terminal block, split unit junc-
27, 28 tion box
TD5–8 Time delay, part winding, com-
pr #1 - 4
TD10 Time delay, hi turn down burn-
er
Standard location
Main control box
Main control box
Main control box
Main control box
Main control box
Main control box
Main control box
Main control box
Main control box
Main control box
Return section
Main control box
Main control box
Gas heat box
Main control box
Cabinet sections
Cabinet sections
Discharge section
Return section
Main control box
Electric heat box
Main control box
Main control box
Main control box
Main control box
Electric heat box
Main control box
Main control box
Main control box
Main control box
Main control box
Main control box
Heat control box
Junction box, split unit
Main control box
Gas heat box
McQuay IM 987