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Honeywell TRADELINE Y594 User Manual

Multistage thermostat subbase package
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TRADELINE
APPLICATION
These Y594G and Y594J combination packs are designed
to meet the specific requirements of Carrier heat pump
equipment. The Y594 packs are designed for 2 stage heat
and 1 stage cool applications. The system switch is SUPL
HT-HEAT-OFF-COOL or SUPL HT-ON-OFF. The fan
switch is AUTO-ON. See Table 1 for model information
and cross reference from Carrier part numbers.
Fig.
OS No.
No.
Y594G1666
7
T874G2004
Q674L1892
Y594G1674
6
T874G2004
Q674J1274
Y594J1001
5
T874J1069
Q674L1900
Y594J1019
4
T874J1069
Q674J1282
Thermostat Ratings
SWITCHING: sealed mercury switch.
SWITCH RATINGS:
First Stage Heating and Cooling: 6.5A inrush, 1.5A
maximum running at 25 Vac.
Second Stage Heating and Cooling: 1.5A maximum
running at 30 Vac.
Changeover Switch: 6.5A inrush, 1.5A running at 25
Vac.
HEAT ANTICIPATOR:
First Stage Heating and Cooling: fixed voltage type,
1.0A.
Second Stage Heating: adjustable, 0.10 to 1.2A; other
models, fixed voltage type, 1.0A.
TEMPERATURE SETTING RANGE: 42 F to 88 F (6 C to
31 C).
Copyright © 1995 Honeywell Inc. •
(Multistage Thermostat Subbase)
®
Table 1. Heat Pump Thermostat/Subbase Combinations.
Contains
Replaces Honeywell
Y507J1011 T874G1055
Y507J1003 T874G1055
—
—
• All Rights Reserved
Subbase Ratings
SWITCH RATING: 7.5A inrush, 2.5A running at 30 Vac.
MOUNTING: Designed for mounting on wall or horizontal
outlet box.
99TZ90041106
Q674L1041
99TZ90040106
Q674J1035
T874J1002
—
Q674L1074 or
Q674L1637
T874J1002
—
Q674J1068 or
Q674J1159
OPERATION
The two stages of heat are energized sequentially with
changes in temperature. Stage one comes on first; then if
the temperature at the thermostat continues to move away
from the setpoint, the second stage comes on. The
thermostat is set with about 2 F (1 C) between stages. As
the heating equipment runs and the temperature begins to
move back toward the set point, stage 2 goes off first, then
stage one.
Subbases include an LED (light emitting diode) indicator.
This indicator lights to show that the heat pump cannot
operate and the supplemental heat stage is providing all
heating. This condition can occur in two instances; when
the subbase system switch is set at SUPL. HT. and when
the heat pump compressor has malfunctioned.
The LEDs are not field replaceable.
X-XX UL
Package
INSTALLATION INSTRUCTIONS
Replaces Carrier
HH07AT171
HH93AZ175
HH07AT171
HH93AZ173
HH07AT175
HH93AZ186 or
HH93AZ195
HH07AT175
HH93AZ183 or
HH93AZ196
Y594
Changeover
Mode
Manual
changeover in
cooling
Auto
changeover in
cooling
Manual
changeover in
cooling
Auto
changeover in
heating
69-0920

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Summary of Contents for Honeywell TRADELINE Y594

  • Page 1 The thermostat is set with about 2 F (1 C) between stages. As the heating equipment runs and the temperature begins to move back toward the set point, stage 2 goes off first, then stage one.

  • Page 2: Recycling Notice

    Mount the subbase on a wall or horizontal outlet box. To mount it on a vertical outlet box, order Honeywell part no. 196393A Cover Plate Assembly, which includes an adapter ring with two screws for vertical outlet box mounting and a cover plate to cover marks on the wall.

  • Page 3: Temperature Setting

    See Fig. 1. Do not overtighten captive mounting screws. This can damage the threads in the subbase. Place the upper edge of the thermostat cover on the base and swing cover downward until it engages retaining posts on base. Tighten the locking cover screws if assembly is provided.
  • Page 4 FIELD WIRING CONNECTION DENOTES CONNECTION POINT BETWEEN SUBBASE AND THERMOSTAT THERMOSTAT FALL H1 ANTICIPATOR H2 ANTICIPATOR H2 FALL RISE C1 ANTICIPATOR RISE Fig. 4. Y594J1019 Thermostat/Subbase switching and internal connections. 69-0920 AUTO CO STAGE SUPL. HEAT SUBBASE SWITCH AUTO SYSTEM SWITCH SUPL.
  • Page 5 FALL ANTICIPATOR ANTICIPATOR FALL RISE C1 ANTICIPATOR RISE POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. Fig. 5. Y594J1001 Thermostat/Subbase switching and internal connections. Y594 (MULTISTAGE THERMOSTAT SUBBASE) PACKAGE AUTO COOL C0 STAGE SUPL. HEAT HEAT SUBBASE SWITCH AUTO SUPL.
  • Page 6 THERMOSTAT H1 ANTICIPATOR FALL H2 ANTICIPATOR FALL C1 ANTICIPATOR RISE RISE POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. Fig. 6. Y594G1674 Thermostat/Subbase switching and internal connections. 69-0920 AUTO SUPL. HEAT SUPL. HEAT SUBBASE SWITCH AUTO SYSTEM SWITCH SUPL.
  • Page 7 FALL H2 ANTICIPATOR FALL C1 ANTICIPATOR RISE C1 RISE POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. Fig. 7. Y594G1666 Thermostat/Subbase switching and internal connections. Y594 (MULTISTAGE THERMOSTAT SUBBASE) PACKAGE AUTO HEAT SUPL. HEAT SUPL. HEAT SUBBASE SWITCH...
  • Page 8 Set the system switch on the subbase at HEAT or ON and the fan switch at AUTO. Move the heating lever on the thermostat about 10 F (6 C) above room temperature. Heating (both stages if two-stage thermostat) should start if there is no time delay or outdoor temperature limiting system, and the fan should come on.