Carrier AQUAZONE 50QE900-250FS Operations Instructions download pdf

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 111 Catalog No. 535-00106 Printed in U.S.A. Form 50QE-5SI Pg 1 6-03 Replaces: New

Book 1 4

Ta b 5 a 5a

Installation and Operating Instructions

Part Number 50QE900-250FS

CONTENTS

Page

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . . . . 1

GENERAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Select Thermostat Location

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

Install Thermostat (With Junction Box)

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

Install Thermostat (Without Junction Box)

. . . . . . . 4

Set Clock

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Configure Advanced Setup

. . . . . . . . . . . . . . . . . . . . . . . 5

Install Accessories

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Program Thermostat Schedules

. . . . . . . . . . . . . . . . . . 6

Factory Defaults

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Calibrate Sensor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Check Thermostat Operation

. . . . . . . . . . . . . . . . . . . . . 8

Final Checklist

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

OPERATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10

Auto-Changeover

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Two-Stage Operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Clock Backup

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Fan Operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Emergency Heat

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Holiday Mode

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Remote Temperature Sensor

. . . . . . . . . . . . . . . . . . . . . 8

Keypad Lock

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Dry Contact Switch/External Control

. . . . . . . . . . . . . 9

10-Watt Resistor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Outside Temperature Sensor (Optional)

. . . . . . . . . . 9

TROUBLESHOOTING

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

SAFETY CONSIDERATIONS

Read and follow manufacturer instructions carefully. Fol-

low all local electrical codes during installation. All wiring

must conform to local and national electrical codes. Improper

wiring or installation may damage thermostat.

Recognize safety information. This is the safety alert sym-

bol . When the safety alert symbol is present on equipment

or in the instruction manual, be alert to the potential for person-

al injury.

Understand the signal words DANGER, WARNING, and

CAUTION. These words are used with the safety alert symbol.

DANGER identifies the most serious hazards which will result

in severe personal injury or death. WARNING signifies a haz-

ard which could result in personal injury or death. CAUTION

is used to identify unsafe practices which would result in minor

personal injury or property damage.

GENERAL

The commercial, 7-day, programmable thermostats are

wall-mounted, low-voltage thermostats which maintain room

temperature by controlling the operation of an HVAC (heating,

cooling and ventilation) system. Separate heating and cooling

set points and auto-changeover capability allow 4 different pro-

gramming time periods for energy savings.

All thermostats allow up to 4 time/temperature settings to

be programmed per 24-hour period. Each thermostat stores

programs for 7 independent days. Batteries are not required.

During power interruption the internal NEVERLOST™

memory stores programmed schedules for an unlimited time

while the clock continues to run for at least 48 hours.

The thermostat can be configured to accept several different

equipment configurations, and is provided for heat pump

operation.

NOTE: The 50QE900-250FS thermostats have wiring connec-

tions for a remote room sensor.

PACKAGE CONTENTS

IMPORTANT: Read entire instructions before starting

the installation.

ITEM QUANTITY

Thermostat

Cutout Template

1-in. Screws (Junction Box Installation)

-in. Self-Tapping Screws

(Non-Junction Box Installation)

Plastic Tabs

Power Resistor (270 ohm, 10 Watt)

50QE900

Aquazone™ Water Source Heat Pump

Flush-Mounted FlatStat

Commercial Programmable Thermostat

1 2 3 4 5 6 ... 11 12

Summary of Contents

Page 1 - Flush-Mounted FlatStat

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

Page 2 - Select Thermostat Location —

10TROUBLESHOOTINGTable 4 — Thermostat TroubleshootingPROBLEM SOLUTIONDisplay on thermostat not illuminatedCheck for 24 vac at the R terminal connectio

Page 3 - Compressor

Page 4

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

Page 5 - Configure Advanced Setup —

2INSTALLATIONSelect Thermostat Location — The thermostat shouldbe mounted:• approximately 5 ft from the floor• close to or in a frequently used room,

Page 6 - Install Accessories —

38. Turn on power to unit. The thermostat will receive powerfrom the unit. The thermostat will be powered by 24 v,nominal (18 to 30 vac). Terminals R

Page 7

4Install Thermostat (Without Junction Box)1. Turn off all power to unit.2. Using cutout template provided, cut hole into wall. SeeFig. 6.a. If install

Page 8

5Set Clock — The Set Clock function allows the user tochange the time and day displayed on the thermostat. Press andhold the Mode and Override buttons

Page 9 - 10-Watt Resistor —

6SERVICE FILTER (Steps 11 and 12) — Step 11 allows theuser to reset the Service Filter counter to zero and remove the‘‘SERVICE FILTER’’ icon (if di

Page 10 - TROUBLESHOOTING

74. The cooling set point for Unoccupied will be displayed.Use the UP ARROW and DOWN ARROW buttons toraise or lower the cooling set point until the de

Page 11

8Factory Defaults — If the thermostat needs to be reset tofactory default settings, perform the following procedure:1. Hold down the Mode button and p

Page 12 - Ta b 5 a 5 a

9buttons simultaneously. The ‘‘Locked’’ icon will appear on thedisplay.The thermostat is unlocked by performing the same proce-dure. Press and hold th