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APPLICATION
The microprocessor-based W7100G Discharge Water
Temperature Control maintains an average discharge
water temperature for reciprocating chiller applications, by
staging on and off compressors or unloaders as required.
The W7100 can provide up to 10 stages of cooling using a
W7101 Satellite Sequencer.
® U.S. Registered Trademark
Copyright © 2001 Honeywell • All Rights Reserved
Discharge Water
Temperature Control
FEATURES
• Up to six stages of cooling provided.
• Expandable system up to 10 cooling stages using a
W7101.
• Advanced proportional plus integral microprocessor
control algorithm minimizes droop.
• Soft start to minimize compressor cycling during
system start up.
• Adjustable minimum on/off timing and time delay
between stages of either 30 or 60 seconds.
• Adjustable setpoint from 10 to 110°F (-12 to 43°C).
• Adjustable reset differential from 5 to 20°F (3 to 11K).
• Adjustable control band from 0 to 10°F (0 to 6K).
• Reset signal from either an outdoor air or space
sensor.
• C7170 sensor can be used for sensing water
temperature.
• LED show which stages of cooling are energized.
Application ........................................................................
Features ...........................................................................
Specifications ...................................................................
Ordering Information ........................................................
Installation ........................................................................
Operation ..........................................................................
Settings and Adjustments .................................................
System Checkout .............................................................
Troubleshooting ................................................................ 10
W7100G
PRODUCT DATA
Contents
1
1
2
2
3
6
8
9
63-4046-1
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Table of Contents
Related Manuals for Honeywell W7100
Summary of Contents for Honeywell W7100
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Page 1: Table Of Contents
Temperature Control maintains an average discharge water temperature for reciprocating chiller applications, by staging on and off compressors or unloaders as required. The W7100 can provide up to 10 stages of cooling using a W7101 Satellite Sequencer. Contents Application ................ -
Page 2: Specifications
Honeywell, 1885 Douglas Drive North Minneapolis, Minnesota 55422-4386 In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A. -
Page 3: Installation
Disconnect power supply before installation. (21) TEST PLUG SOCKET M17910 CAUTION Fig. 1. W7100 Discharge Air or Water Controller mounting dimensions in in. (mm). Equipment Damage Hazard. Compressor stage ON/OFF times less than four minutes can damage the compressor. Add external time delay relay(s) to W7100G output RESISTANCE stages to turn compressors on and off (See Fig. - Page 4 Assembly Wire Total Number of 7 and 8 off timer(s) on compressor stages. Cooling Stages (Ohms) Colors 1 (W7100 only) Blue Wiring 2 (W7100 only) W7100G wiring and hookup diagram is shown in Fig. 4. 3 (W7100 only) Yellow 4 (W7100 only)
- Page 5 WHEN RESET NOT USED, JUMPER TERMINALS 6 AND 7 COOL ON W7100. HEAT WHEN REMOTE SETPOINT NOT USED, JUMPER TERMINALS COOL 9 P AND P1. WHEN USED, TURN SETPOINT KNOB ON W7100 COOL TO MINIMUM POSITION. FUNCTION HEAT SELECT TO USE COOL 3 AND 4, REMOVE JUMPER FROM TERMINALS COOL 10 6 AND 7 ON THE W7101A SEQUENCER.
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Page 6: Operation
30 or 60 seconds, using fast response input). In reset applications where high humidity can be a concern, 2. The W7100 first stage energizes. an outdoor air thermostat can be installed to override the reset 3. At point B, the discharge water temperature is still function. - Page 7 Outdoor reset can be employed as an alternative to space reset (C7031G1016). The advantages to outdoor reset are Use Table 3 to select the point at which no W7100 setpoint that it is simple to apply with a minimum of field wiring. The...
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Page 8: Settings And Adjustments
Control Band Knob Set for desired control band. Increasing the control band slows down the W7100 response, and increases the temperature deviation. Lowering the control band speeds up the W7100 response, while decreasing the temperature deviation from setpoint. -
Page 9: System Checkout
Set W7100 reset knob at 20°F (11K) — Set W7100 setpoint at 10°F (-12°C) — Connect 24 Vac power to the W7100 (TR and TR terminals) Check for 24 Vac across W7100 TR and TR terminals. Wait 15 seconds. — All W7100 stages should be energized All red LED should be on. -
Page 10: Troubleshooting
4. System malfunction. 4. Consult HVAC manufacturer’s equipment manual and/or building engineering requirements. Short cycling. 1. Test plug left inserted in W7100 bottom. 1. Remove test plug. 2. System malfunction. 2. Consult HVAC manufacturer’s equipment manual and/or building engineering requirements. - Page 11 63-4046—1...
- Page 12 By using this Honeywell literature, you agree that Honeywell will have no liability for any damages arising out of your use or modification to, the literature. You will defend and indemnify Honeywell, its affiliates and subsidiaries, from and against any liability, cost, or damages, including attorneys’ fees, arising out of, or resulting from, any modification to the literature by you.