McQuay WGSH Installation Manual

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Page 1

Installation Operation & Maintenance Data

Remote Sensors

Indoor (Part No. 910129095) Outdoor (Part No. 910129096)

Used With:

Programmable Touch-Screen Thermostat (Part No. 910121750)

SmartSource™ Units - Models GS & GT

Outdoor Probe

IOM 1175

Group: WSHP

Part Number: 910133390 Date: July 2012

Outdoor Remote Sensor

Indoor Remote Sensor

IMPORTANT!

Operator, save these instructions for future use!

Contents

Safety ....................................................................................2

Specications

Installation

Indoor Sensor Outdoor Sensor

......................................................................2

............................................................................2

...................................................................2

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Wiring

...................................................................................3

Indoor Remote Sensor Wiring Diagram Outdoor Remote Sensor Wiring Diagram

Conguration

Troubleshooting Chart

.......................................................................4

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............................3

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Safety

WARNING

Wiring connections must be made in accordance with all

applicable electrical codes. Failure to read and follow all instructions carefully before installing or operating this control could

cause personal injury and/or property damage.

CAUTION

To prevent electrical shock, disconnect electric power to system

at main fuse or circuit breaker box until installation is complete.

If in doubt about whether your wiring is millivolt, line, or low volt-

age, have it inspected by a qualied heating and air conditioning contractor or electrician.

Do not exceed the specication ratings.

All wiring must conform to local and national electrical codes

and ordinances.

This control is a precision instrument, and should be handled

carefully. Rough handling or distorting components could cause the control to malfunction.

The remote sensors cannot be used with systems where power

interruptions are part of normal system operation.

NOTICE

Specications

Note: Remote sensor 910129095 is approved for indoor use

only.

Temperature range: 40° to 99°F Operating humidity range: 0 to 90% RH (non-condensing).

20-gauge, three-conductor shielded cable must be used for all remote sensor wiring.

Note: Remote sensor 910129096 is approved for outdoor

use only.

Temperature range of outdoor probe: -40° to 140°F 20-gauge, three-conductor shielded cable must be used for all remote sensor wiring.

Installation

Indoor Sensor

5. Avoid locations close to windows, adjoining outside walls, or doors that lead outside.

6. Avoid locations close to air registers or in the direct path of air from them.

7. Make sure there are no pipes or duct work in that part of the wall chosen for the sensor location.

8. Never locate sensor in a room that is normally warmer or cooler than the other areas being conditioned.

9. Avoid locations with poor air circulation, such as behind doors or in alcoves.

10. In the home, the living or dining room is normally a good location, provided there is no cooking range or refrigerator on opposite side of wall.

Outdoor Sensor

Select Sensor Location

Proper location insures that the remote sensor will provide a correct outdoor temperature reading. Observe the following general rules when selecting a location:

1. The interior mounting base can be located a maximum of 300 feet from the thermostat.

2. Install the interior mounting base within 12 ft. of the intended outdoor probe location.

3. Never install the outdoor probe where it will be exposed

to direct light from lamps, sun, replaces or any

temperature radiating equipment.

4. Make sure there are no pipes or ductwork in the wall chosen for the base location.

5. Outdoor temperature measurement requires installing the probe outdoors. Good probe locations would be under a bay window or overhang, out of direct sunlight. Direct sun exposure will affect sensed temperature. Install probe with spacer to obtain a more accurate temperature.

Figure 1: Outdoor probe mounting detail

Spacer

Mounting Surface

Select Sensor Location

Proper location insures that the remote sensor will provide a comfortable home or building temperature. Observe the following general rules when selecting a location:

1. The remote sensor can be located a maximum of 300 feet from the thermostat.

2. Locate sensor about 5 ft. above the room oor level.

3. Install sensor on a partitioning wall, not on an outside wall.

4. Never expose sensor to direct light from lamps, sun,

replaces or any temperature radiating equipment.

Page 2 of 4 / IOM 1175

6. Although connected to the probe wire for outdoor temperature sensing, the interior mounting base must be placed indoors. Therefore, the interior mounting base must be installed near the perimeter of the building, so that the probe wire can be run through to the outside of the structure and placed in the selected (shaded) location. The outdoor probe wire is 12 feet long (and should not be cut or spliced), so plan the placement of both the probe and interior mounting base accordingly. Any excess wire may be coiled or bundled. The probe should be connected to E2 as shown in Figure 3.

Page 3

Wiring

CAUTION

Do not allow the 3-conductor wire to be pinched between the

sensor and the wall.

Check wire connections before applying power. Improper con-

nections will lead to permanent damage to the sensor.

20-Gauge Shielded cable must be used. Cable shield must be

connected to “-” or S3 on the THERMOSTAT ONLY.

Old Terminal (Thermostat or

Remote)

S1 + S2 S S3 -

New Terminal

(Thermostat or Remote)

Table 8: Indoor sensor

Table 7: Connection cross-reference

Model Number Color Dimensions Application

910129095 Classic White 2-1/8" × 3-1/2" × 3/4"

Compatible with Programmable Touch Screen Thermostat (Part No. 910121750)

with indoor remote sense

Table 9: Outdoor sensor

Model Number Color Dimensions Application

910129096 Classic White 2-1/8" × 3-1/2" × 3/4" with 12' sensor lead

Compatible with Programmable Touch Screen Thermostat (Part No. 910121750)

with outdoor remote sense

Indoor Remote Sensor Wiring Diagram

Figure 2: Indoor Remote Sensor (910129095) wiring to Programmable Touch Screen Thermostat (910121750)

Thermostat Base

Remote Indoor Sensor

G RC RH

D/A

–

Outdoor Remote Sensor Wiring Diagram

Figure 3: Outdoor Remote Sensor (910129096) wiring to Programmable Touch Screen Thermostat (910121750)

Thermostat Base

G RC RH

Outdoor Probe

D/A

Remote Outdoor Sensor

–

IOM 1175 / Page 3 of 4

Page 4

Conguration

When installing a remote sensor you must enable the remote sensor option. See “Installer/Conguration Menu” in IM 1178.

Troubleshooting Chart

To function correctly and read temperature accurately, the thermostat (when set up for a remote as outlined above) must have constant 24-volt power. If the thermostat temperature is steadily dropping, reading low, or reads 08° when a remote sensor is installed, it can be traced to one of the three following conditions.

Condition Test Comments

On models with batteries, remove the batteries and re-

1. Loss of 24-volt power.

2. A broken wire on +, SA, - from the thermostat to the remote.

3. A shorted or damaged remote sensor.

install thermostat. If the display is blank, check heating and cooling system to determine why 24-volt power is absent.

Disconnect sensor wires at thermostat. Attach a short piece (2') of three-wire shielded cable to (+, SA -) on the subbase.

Bring the remote sensor to the thermostat, location and

attach (+, S, -) respectively. Reattach thermostat. If the temperature begins to climb (slowly), it is reading correctly. If it reads correctly with the 2' length but improperly when attached to the wire run, it indicates a fault in the wire run.

Because it is an electronic sensor, there are no Ohm values

to test. If correct conditions as listed in 1 & 2 above and the temperature stays at or near 08°, it indicates a shorted or damaged remote sensor.

Note: Digital thermostats and remote sensors acclimate very slowly to temperature change. It may take an hour or more for the

temperature to acclimate to the room temperature from a low temperature reading as outlined above. To expedite the room temperature display use the reset instructions listed in the installation instructions for the thermostat model you are working with. When reset, the thermostat will default to a room temperature of 70° and begin sensing room temperature. Be sure to

recongure the installer menu for a remote sensor because the reset function may cancel remote sensing.

For the sensor to read correctly, the 24-volt system power must be present. Some systems may require an isolation relay to provide constant power to the thermostat. Limit or safety devices in the equipment can also cause a power interruption

Repair or replace the 3 wire shielded cable. Be sure the remote wire run is not parallel to line voltage wires that carry heavy inductive loads, or across uorescent light ballasts that may cause an inductance to be transmitted to the thermostat.

Replace remote sensor.