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IM 812 / Page 16 of 28

11. Test the CONTINUOUS/CYCLE fan by selecting HEAT or

COOL  mode and raising or lowering the temperature set
point. With dip switch #8 OFF (down), the indoor fan will
continue to run regardless of whether the unit is calling for
heating/cooling or not. With dip switch #8 ON, the indoor
fan will  run continuous while unit calls for heat or cool
and be OFF 7 minutes and ON 2 minutes if unit is not
heating or cooling. We recommend leaving dip switch #8
ON to conserve energy.

12. ROOM FREEZE PROTECTION – Unless the owner has

expressly rejected this feature (40

o

-50

o

F minimum room

temperature), leave dip switch #4 of 4 OFF (down). To test,
place the room temperature sensor in ice water and the
heat will come on regardless of the control mode or
temperature settings.

13. WIRED REMOTE ON/OFF – If this feature is being used,

connect the two low voltage wires, coming from the re-
mote dry contacts, to the F. DESK receptacle behind the
access cover on front of the control box. Use the small
plug and wire assembly provided. Test by closing the re-
mote dry contacts. Control pad should now show settng
for P1 (see page 5 for information on P1). When the dry
contacts are reopened, the unit setting should be: Heat at
65

o

F if room temperature is below 68

o

F or Cool at 75

o

F if

room temperature is above 68

o

F.

14. TEMPERATURE LIMITING – If the owner wants the con-

trol temperature range to be less than the factory stan-
dard (60

o

-85

o

F), it can be reduced using dip switches #1 -

#4 of 8. See charts on page 4.

15. MOTION SENSOR & DOOR SWITCH (Optional–must be

ordered separately) – To activate, dip switch #3 of 4 must
be OFF. Using the plug assemblies that ship with the unit,
connect motion sensor and door switch to receptacles
marked “MOTION” & “DOOR” behind the access cover
on front of control box. NOTE: If using the wall mounted
control pad that includes a motion sensor, the wiring is
already included in the cable. The only extra wiring re-
quired is for the door switch. For additional details, see
the instructions that ship with the motion sensor. Program
memory P1 & P2 for the desired temperature and mode
(see page 5). To test, short the 2 prongs (located to the left
of the dip switches and labeled “T-SHRT”) with wire or tin
foil to reduce the 15 minute delay to 3 minutes, and the 14
hour delay to 6 minutes. Set mode and temperature on
unit, (different than programmed for P1 & P2) then exit
room and close door. After 3 minutes re-enter the room.
Unit should now show mode and temperature pro-
grammed for P2. Again set the mode and temperature on
unit (different than programmed for P1 & P2). Exit the room
and close the door. Wait 6 minutes then re-enter the room.
The unit should now show mode and temperature pro-
grammed for P1. Remove the short from the T-SHRT
prongs to restore the normal 15 minute and 14 hour time
delays.

Failure to remove short for long term operation will dam-
age the equipment and void the warranty.

16. WIRELESS REMOTE CONTROLLER – If this optional ac-

cessory will be used, check it out at this time. It will only
work with the control pad (either unit or wall mounted).
You should be able to control the unit from anywhere in
the room by pointing the remote controller at the control
pad.

17. HEAT PUMP OVERRIDE – For units with reverse cycle

heating, check the override feature. Note: The outdoor tem-
perature should be above 40

o

F and dip switch #7 behind

the access cover on front of the control, must be OFF.
Select the HEAT mode with temperature setting calling
for heat. The compressor and outdoor fan should be op-
erating and the room discharge air should be warm indi-
cating reverse cycle heating. (NOTE: if using the control
pad, temperature setting must be no more than 2

o

F above

room temperature for reverse cycle to work. If more than
2

o

F above, electric heat will energize). Slide dip switch #7

to ON then unplug and plug in the power cord to activate
the changes. The compressor and outdoor fan should not
operate, but the unit should continue to discharge warm
air, indicating it is now heating with electric heat. This fea-
ture provides electric heating if the compressor fails, or if
reverse cycle heating is not sufficient at lower outdoor tem-
peratures. Leave dip switch #7 OFF for normal operation.

18. REMOTE WIRED THERMOSTAT – If a remote thermostat

will be used in lieu of the control pad, install the decora-
tive cover in its place. Connect the low voltage remote
thermostat wires to the 7 pin receptacle CN2 behind the
access cover on the control box front, use the plug and
wire assembly provided with the unit (see figure 16, page
17 for additional information). Mount and wire the remote
thermostat per the instructions that come with it. Slide
dip switch #1 of 4 to ON. After this, unplug the power
cord and plug it back in again to reset the control for re-
mote thermostat. For more information, see pages 5 and 8.
Check the operation of the conditioner using the instruc-
tions supplied with the remote thermostat.

19. DISCHARGE GRILLE – As shipped, the front panel dis-

charge grille will angle 35

o

 from vertical, towards the room.

This will normally give the best air circulation. However,
by removing 4 screws and reversing the grille, this angle
can be reduced to 15

o

 from vertical. Once the grille angle

has been decided, place the front panel back on the chas-
sis. Hook it at the top and snap it on at the bottom. Re-
place the two screws.

CAUTION

!

Summary of Contents for IM 812-2

Page 1: ...Installation Maintenance Data IM 812 2 Group PTAC PTHP Date April 2006 McQuay Remington Packaged Terminal Air Conditioners and Heat Pumps C Vintage 2006 McQuay International...

Page 2: ...2 Wall Sleeve 3 Outdoor Louver 4 Subbase Optional for 208V and 230V units but manda tory for all 265V 5 Separate plug in power cord selects heater size NOTE Some units with fixed heaters are also avai...

Page 3: ...nal kW 30A Electric Heater7 Z 5 0 Nominal kW 20A 265V Electric Heater8 C Chassis Mounted Control9 W Wall Mounted Control10 Notes 1 All chassis ship with an Installation Manual and mounting screws 2 Fa...

Page 4: ...on the indoor fan will operate continuously When dip switch 8 is in the ON position the indoor fan will cycle on and off with the compressor or heater In cycle fan dip switch 8 ON the fan will start e...

Page 5: ...y using a G11 hand held remote con troller available from your sales representative Programming P1 using the G11 control press and hold the upper button for 3 seconds until P1 starts flashing on the G...

Page 6: ...e used to provide support over each opening The rough opening should measure 161 4 high x 421 4 wide see Figure 2 Note 2 When a subbase is used the opening must start 31 4 or 41 4 above the finished f...

Page 7: ...n using the outdoor drain kit the sleeve must be flush or beyond the outside finished wall do not recess Install the outdoor drain kit as follows 1 Assemble the drain kit as shown in Figure 4 2 Choose...

Page 8: ...60 from where it exits the conditioner Do not use extension cords When a subbase is not used the receptacle is generally mounted beneath the conditioner or on the wall beside it 208 230V only An elect...

Page 9: ...subbase or from other field supplied materials or it can be floor mounted for 208 230V Install as follows 1 Clean the opening of all debris that may interfere with installation 2 If the unit is to be...

Page 10: ...lace a thin pad of mastic on bottom of the opening and slide in the wall sleeve Be sure to recess the wall sleeve enough to accommodate outside louvers This recess is 3 8 for stamped louvers and 11 8...

Page 11: ...optional drain kit is to be employed heat pumps only refer to page 7 before proceeding 4 If wall thickness exceeds dimensions shown in Table 1 a wall sleeve extension must be used Install the extensio...

Page 12: ...the caulking does not block the weep holes 3 Attach indoor drain kit if used according to the instruc tions on page 7 Outdoor drain kits are not designed to be used with sleeve extensions Louver Fram...

Page 13: ...blade design that will not cause recir culation of condenser air Free area is defined by ASHRAE as the minimum area of the openings in an air inlet or outlet through which air can pass Have your local...

Page 14: ...the room The chassis weighs approximately 150 lbs Use blocking and lifting devices Do not raise over any body parts 1 Remove the shipping carton and inspect for any shipping damage Report any found t...

Page 15: ...located at the lower left end of the chassis See Figure 15 Note Remove shipping screw from door if it needs to be opened 4 If the conditioner will use the standard control pad continue to step 5 If a...

Page 16: ...the room and close the door Wait 6 minutes then re enter the room The unit should now show mode and temperature pro grammed for P1 Remove the short from the T SHRT prongs to restore the normal 15 minu...

Page 17: ...emoval Also see pages 5 and 8 2 If a subbase is used under the unit wall sleeve a small hole may be drilled and grommeted in the subbase front to allow passage of the low voltage wires 3 When using a...

Page 18: ...Disconnect all electric power including remote disconnects before servicing Failure to discon nect power before servicing can cause severe personal injury or death Use copper conductors only Unit term...

Page 19: ...age Disconnect all electric power including remote disconnects before servicing Failure to discon nect power before servicing can cause severe personal injury or death Use copper conductors only Unit...

Page 20: ...Voltage Disconnect all electric power including remote disconnects before servicing Failure to discon nect power before servicing can cause severe personal injury or death Use copper conductors only U...

Page 21: ...rce 2 Remove the front panel and clean it 3 Remove the chassis from the wall sleeve and move it to the maintenance department Replace it with spare chassis or weather plate 4 Check all seals and insul...

Page 22: ...and the temperature of the conditioned space is 80o F Figure 20 Refrigeration Cycle 80o F Room Air to Evaporator 45o F R22 Liquid and Gas to Evaporator Capillary Restrictor 120o F Condenser Air to Out...

Page 23: ...h condenser due to 1 Dirty condenser 2 Obstructed outdoor louver 3 Condenser fan not running 4 Condenser fan not up to speed 5 Condenser fan slipping on motor shaft 6 Recirculation of condenser air a...

Page 24: ...air flow 3 Clean or replace 4 Remove obstructions 5 Check motor 6 Check for correct voltage 7 Adjust blower wheel position and tighten set screw d Refer to original load calculations recalculate heat...

Page 25: ...Loose plug connec tion defective control pad or PC board a Replace b Replace c Replace d Clean coils fans or filters Replace fan motor Check baffles in sleeve extension Check free area of louver Repla...

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Page 28: ...visit us at www mcquay com and click on training or call 540 248 9646 and ask for the Training Department Warranty All McQuay equipment is sold pursuant to its standard terms and conditions of sale i...

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