McQuay Maverick I IM 865 MPS006AY, Руководство по установке и обслуживанию

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IM 865 13
GROUNDING MAY BE ACCOMPLISHED BY GROUND-
ING THE POWER LINE CONDUIT TO THE UNIT. MAKE
SURE THE CONDUIT NUT LOCKING TEETH HAVE
PIERCED THE INSULATING PAINT FILM OF THE SIDE
PANEL.
Thermostat
The thermostat should be mounted on an inside wall about
five feet above the floor in a location where it will not be
affected by unconditioned air, sun, or drafts from open doors
or other sources. READ installation instructions in thermostat
package CAREFULLY because each has some different
wiring requirements. The low voltage wiring should be sized
as shown in Table B.
Install the room thermostat in accordance with the instruction
sheet packed in the box with the thermostat.
Indoor Air Flow Data
Belt-drive blower models have motor sheaves set for proper
CFM at a typical external static. See Table F for blower per-
formance.
Pre-Start Check
1 Is unit properly located and slightly slanted toward indoor
condensate drain?
2 Is ductwork insulated, weatherproofed, with proper spac-
ing to combustible materials?
3 Is air free to travel to and from outdoor coil? (See Figure
5.)
4 Is the wiring correct, tight, and according to unit wiring
diagram?
5 Is unit grounded?
6 Are field supplied air filters in place and clean?
7 Do the outdoor fan and indoor blower turn freely without
rubbing, and are they tight on the motor shafts?
Startup
1 Turn thermostat to “OFF,” turn “on” power supply at
disconnect switch.
2 Turn temperature setting as high as it will go.
3 Turn fan switch to “ON.”
4 Indoor blower should run. Be sure it is running in the
right direction.
Figure 14: Low Voltage Connections Diagrams
STANDARD CONTROL WIRING
R
W
G
Y
Y2
C
RED
BLACK
GRAY
YELLOW
ORANGE
BROWN
THERMOSTAT
SUB-BASE
UNIT CONTROLS
WIRE PIGTAILS
Table C
FIELD WIRE SIZE FOR 24 VOLT THERMOSTAT CIRCUITS
SOLID COPPER WIRE - AWG.
3.0 16 14 12 10 10 10
2.5 16 14 12 12 12 10
2.0 18 16 14 12 12 10
50 100 150 200 250 300
Length of Run – Feet (1)
Thermostat Load -
Amps
(1) The total wire length is the distance from the furnace to the thermo-
stat and back to the furnace.
NOTE: DO NOT USE CONTROL WIRING SMALLER THAN NO. 18
AWG.