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V404, V504, V524, V804, and VS824
Automatic Valve Operators
APPLICATION
These valve operators provide automatic main valve
operation in the VB00, VRB00, and VR8440 families of
combination gas controls. The operators are
interchangeable and can be used either for replacement
or to add automatic operation to a C580/CS580 series
manual valve. They cannot be used on VR850 series
two-stage valves.
The V404, V804, and VSB24 are magnetic operators.
They contain an electromagnet that is energized to open
the main valve when the thermostat contacts close on a
call for heat. The V404/V804/VS824 replacement
operator package includes:
• Operator
• Operator Gasket
• Two Round Regulator Gaskets
• 388589BA Mounting Screws for Standard Capacity
Valves
The V504 and V524 are mechanical operators. They use
a bulb ·and bellows assembly filled with a temperature-
sensitive liquid to open and close the main valve. The
liquid expands and contracts with temperature changes,
expanding and contracting the bellows and operating
the valve. V504 provides modulating control; V524
provides on-off control. The V504/V524 replacement
operator package includes:
• Operator
Operator
Model
Min. Rate
Number
in. wc
V504A
1.2
V504B
4.0
Table 1. Automatic Valve Operator Application.
Pressure Regulator Setting
Full Rate
kPa
in. wc
kPa
0.3
3.5
0.87
1.0
11.0
2.7
Installation INSTRUCTIONS
• Operator Gasket
• 394018 Red Knob and Setscrew
• 394138 Red Knob and Setscrew
• 394075 Black Knob and Setscrew
• 388589BF Mounting Screws for Standard Capacity
Valves
The bulb and bellows assembly must be ordered
separately; see Table 2.
Longer screws are required to mount the operators on
nigh capacity valves. Obtain four screws locally as
follows:
V404, V804, VS824-No. 8-32 UNG, 1-13/16 in. V504,
V524-No. 8-32 UNG, 2-3/8 in.
Ambient temperature ratings are as follows:
V404A, V804A, VSB24A-plus 32 F to 175 F [0 C to
80 C]
V404B, V804B, VS824B-minus 40 F to plus 175 F
[minus 40 C to plus 80 C].
V504, V524-plus 32 F to 125 F [0 C to 52 C].
The V504 and V524 operators include a pressure reg-
ulator; see Table 1 for settings. A separate pres-
sure regulator is used with the V404, V804, VS824
operators.
Control
Adjustment
Limited
Mechanical —
temperature-sensitive
For LP gas
Add-on or Replacement
Operator on:
C580,C581, V500, V501,
V510, V511
bulb
95-6999-08
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Summary of Contents for resideo V404
- Page 1 The V504 and V524 operators include a pressure reg- ulator; see Table 1 for settings. A separate pres- The V504 and V524 are mechanical operators. They use sure regulator is used with the V404, V804, VS824 a bulb ·and bellows assembly filled with a temperature- operators.
- Page 2 V404, V504, V524, V804, AND VS824 AUTOMATIC VALVE OPERATORS Table 1. Automatic Valve Operator Application. (Continued) Pressure Regulator Setting Operator Model Min. Rate Full Rate Control Add-on or Replacement Adjustment Number in. wc in. wc Operator on: V524A 0.87 Limited Mechanical —...
- Page 3 V404, V504, V524, V804, AND VS824 AUTOMATIC VALVE OPERATORS V404, V804, VS824 INSTALLATION REMOVING OLD OPERATOR 1. Disconnect wiring as follows: 24 volt and millivoltage systems: Disconnect lead wires at terminal block, marking each lead with the terminal designation as it is removed.
- Page 4 V404, V504, V524, V804, AND VS824 AUTOMATIC VALVE OPERATORS Fig. 4. Mounting operator and pressure regulator on typical combination gas controls. 4. Insert 4 correct-length screws into mounting holes. Use the screws provided for standard capacity gas controls and No. 8-32 UNC, 1-13/16 in.
- Page 5 V404, V504, V524, V804, AND VS824 AUTOMATIC VALVE OPERATORS WIRING If replacing operator, reconnect wiring as in the original LINE VOLTAGE installation. If installing valve operator on manual valve, LINE VOLTAGE THERMOSTAT OPERATOR follow wiring procedure below. OR CONTROLLER All wiring must comply with local codes and ordinances.
- Page 6 V404, V504, V524, V804, AND VS824 AUTOMATIC VALVE OPERATORS 8. Make sure bellows tip is seated in hole in main valve body and operator is seated on metal locat- ing pins. 9. Insert 4 correct-sized operator mounting screws. Use the screws provided for standard capacity valves and No.
- Page 7 V404, V504, V524, V804, AND VS824 AUTOMATIC VALVE OPERATORS CALIBRATE OPERATOR AND INSTALL SETTING KNOB Calibration is necessary whenever the V504, V524. operator or the bulb and bellows assembly is replaced. During calibration, refer to Table 3 to correlate room temperature with the numbers on the setting dial.
- Page 8 Resideo Technologies, Inc. 1985 Douglas Drive North, Golden Valley, MN 55422 1-800-468-1502 95-6999—08 M.S. Rev. 09-21 | Printed in United States www.resideo.com © 2021 Resideo Technologies, Inc. All rights reserved. This product is manufactured by Resideo Technologies, Inc. and its affiliates.
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