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McQuay FDD Series Скачать руководство пользователя страница 20

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Boilerless System Kit (BSK)

P/N 062522201 for Sizes 007 to 042 & P/N 062522204 for Sizes 048 to 060

The BSK option for use with the Mark IV/AC control board
provides the capability to control a remote duct heater. The
duct heater must be provided with a low voltage control
circuit that only requires a set of dry contacts for operation.

The contacts shown on the Boilerless System board (termi-
nals 1, 2, and 3) are used to control the remote duct heater,
the N.O. contacts will close on a call for duct heater heat.
POT1 provides a means to manually adjust the water tem-
perature setpoint (adjustment range is 43

o

F to 60

o

F). The

The BSK field installed kits include the sheet metal enclosure
with cover, wire harness, boilerless system board, auxiliary
relay, and water temperature sensor. When used, one BSK is
required for each unit. To use the BSK kit you attach the sheet
metal enclosure to the unit as shown, route the 4-wire
harness through knockouts and connect to the Mark IV/AC
board, mount and connect and insulate the water tempera-
ture sensor on the water supply line, and then connect the
duct heater control contacts to the duct heater control
circuit.

9.66

(245 mm)

(007 – 042)

14.50

(368 mm)

(048 – 060)

6.5 (165 mm) (007 – 042)

4.12 (105 mm) (048 – 060)

1.75

(44.5 mm)

If night setback (U-terminal) is used, the duct heater will
respond to the occupied W1 thermostat signal. The load
shed input (L-terminal) cannot be used for other control
functions when being used with the BSK.

The BSK is a DC voltage device, when the BSK is used the
thermostat must be wired for VDC operation.

RD

WSHP Mark IV/AC Board Low Voltage Terminal Strip

1

2

3

Auxiliary Relay

Orange

Yellow

White

12

3

4

5

RD

BR

WH

OR

OR

WH

WH

YE

GR

GR

BK

WH

RD

OR

Normal

Override

Pot 1

Boilerless

System

Board

43 Ohm

4-pin

Plug

Water

Temperature

Sensor

Wire Ends to be Field

Connected to the

Mark IV/AC Board

Signal to remote
duct heater
control circuit

Normal/Override switch provides a means to manually force
electric heat to always be used in place of heat pump heat
when in the override position (default position is normal - heat
pump heat).

When the water temperature drops below the value of POT1,
then the duct heater will be used instead of heat pump heat
on a call for heat from the low voltage thermostat (not
included).

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Содержание FDD Series

Страница 1: ...iagrams 8 14 Unit operation 15 LED Status and Fault Output Status 16 Thermostat Connections Mark IV AC units 17 Options for Mark IV AC units 19 22 Troubleshooting 23 Maintenance 24 2006 McQuay Interna...

Страница 2: ...e of rough handling the cartons should be opened at once to check for concealed damage If any damage is found notify the carrier within 48 hours to establish your claim and request their inspection an...

Страница 3: ...ance Opt Controls Main Access Panel Condensate Water Supply Water Return Heat Pump With Right Hand Return Air Arrangement Return Air Opt Controls Elec Entrance Main Access Panel Condensate Water Suppl...

Страница 4: ...duct material the return air duct should be internally lined with acoustic insulation for sound attenuation Glass fiber duct board material is more absorb ing and may permit omission of the flexible c...

Страница 5: ...system may also be made to work ac ceptably but proper water flow balancing is more diffi cult to achieve and maintain 2 The piping can be steel copper or PVC 3 Supply and return runouts are usually...

Страница 6: ...for initial flush and blow down making sure city water fill valves are set to make up water at the same rate Check the pressure gauge at pump suction and manually adjust the makeup to hold the same po...

Страница 7: ...chine should not Operating Limits Environment This equipment is designed for indoor installation only Sheltered locations such as attics garages etc generally will not provide sufficient protection ag...

Страница 8: ...upplied relays attached to the 24 volt terminals R W Y or G may introduce electrical noise Never install relays in series with the inputs Notes 1 Mark IV AC controller board contains a static sensitiv...

Страница 9: ...relays in series with the inputs Figure 10 Unit sizes 019 through 048 208 230 265 volts single phase 060686606 Rev C Notes 1 Mark IV AC controller board contains a static sensitive micropro cessor Pr...

Страница 10: ...switches are normally closed 5 Field supplied relays attached to the 24 volt terminals R W Y or G may introduce electrical noise Never install relays in series with the inputs Figure 12 Unit sizes 02...

Страница 11: ...d relays attached to the 24 volt terminals R W Y or G may introduce electrical noise Never install relays in series with the inputs Notes 1 Mark IV AC controller board contains a static sensitive micr...

Страница 12: ...24 volt terminals R W Y or G may introduce electrical noise Never install relays in series with the inputs Notes 1 Mark IV AC controller board contains a static sensitive micropro cessor Proper ground...

Страница 13: ...o the 24 volt terminals R W Y or G may introduce electrical noise Never install relays in series with the inputs Notes 1 Mark IV AC controller board contains a static sensitive micropro cessor Proper...

Страница 14: ...for 208V operation If 230V power supply is used transformer must be wired by disconnecting the power lead from the red transformer primary wire Place an insulation cap on the red transformer primary w...

Страница 15: ...itch or low pressure switch on unit sizes 048 and 060 The unit does not have to be reset on a condensate overflow detection The Mark IV AC control board has a fault output signal to an LED on a wall t...

Страница 16: ...rces may be used to operate Mark IV AC board inputs Note The fault output is energized when no faults exist The fault output is de energized during faults and when unit power is off Using Drive Using...

Страница 17: ...with other wires Wire 1 should run between the S1 terminal on the thermostat and the S1 terminal on the remote sensor Wire 2 should run between the S2 terminal on the thermostat and the S2 terminal o...

Страница 18: ...rk IV AC Board Low Voltage Terminal Strip WSHP Mark IV AC Board Low Voltage Terminal Strip Multiple Unit Control Panel TB3 TB2 TB1 TB4 R C W1 Y1 W2 Y2 G Thermostat Terminals This version of the board...

Страница 19: ...nal is not being used as a pump restart signal to other equipment If the P terminalmustbeusedasapumprestartsignaltootherequipment then wire the auxiliary relay s yellow wire to Y1 white wire to W1 and...

Страница 20: ...r tempera ture sensor on the water supply line and then connect the duct heater control contacts to the duct heater control circuit 9 66 245 mm 007 042 14 50 368 mm 048 060 6 5 165 mm 007 042 4 12 105...

Страница 21: ...C P terminal will change state causing a contact closure between terminal 58 and 64 signaling the loop water control LWC panel to restart the loop pump if Off The pump restart relay kit is typically m...

Страница 22: ...signals is required on a single WSHP the MicroTech 2000 Auxiliary Module Kit 107239001 must be used and these additional output control signals will be connected to the Auxiliary board 1 circuit unit...

Страница 23: ...eating Check compressor wiring for defective wiring or loose connection Check thermostat for improper location Check for defective compressor internal windings with ohm meter Check for bad compressor...

Страница 24: ...differences both heating and cooling is recommended A comparison of logged data with start up and other annual data is useful as an indica tor of general equipment condition 5 Periodic lockouts alway...

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