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Symmons 7-400 - User Manual

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TempControl thermostatic mixing valve made from lead
free** metal components. Models 102-700 feature
serviceable integral check stops. Models 900 & 1000
feature removable check stops with union ells (see table 1
for ow rates).
Coordinating Model Numbers
Specification
Modifications (Components Certified Separately)
Warranty
5 Years - for commercial installations.
Refer to www.symmons.com/warranty for complete
warranty information.
Compliance
Note: Append appropriate sufx to model number.
TempControl 7 Series
Operation & Maintenance Manual
7-102, 7-200, 7-400,
7-500, 7-700, 7-900, 7-1000
-NI
-W
Rough nickel finish
Wall mounting bracket
-P
Polished chrome highlight finish
HTA-100
BV-( )
High temp audio/visual alarm system
Volume control shut off valves
T-425-( )
3” bimetal dial thermometer
SV-( )
WHA-1
Solenoid valve
Water hammer arrestor
TF-( )
Tee fittings
Note: Insert proper model number in parenthesis.
Table 1: Flow Rate - gpm (L/min)
Valve Model Min. Flow Rate*
Min. Flow Rate
(per ASSE 1017)
Pressure Differential - psi (kPa)
5 psi
(34 kPa)
10 psi
(69 kPa)
20 psi
(138 kPa)
25 psi
(172 kPa)
30 psi
(207 kPa)
45 psi
(310 kPa)
7-102
0.5 gpm
(1.9 L/min)
0.5 gpm
(1.9 L/min)
1 gpm
(4 L/min)
3 gpm
(11 L/min)
6 gpm
(23 L/min)
7 gpm
27 L/min)
8 gpm
(30 L/min)
11 gpm
(42 L/min)
7-200
0.5 gpm
(1.9 L/min)
5 gpm
(19 L/min)
7 gpm
(27 L/min)
12 gpm
(46 L/min)
18 gpm
(68 L/min)
21 gpm
(80 L/min)
23 gpm
(87 L/min)
27 gpm
(102 L/min)
7-400
0.5 gpm
(1.9 L/min)
9 gpm
(34 L/min)
18 gpm
(68 L/min)
27 gpm
(102 L/min)
37 gpm
(140 L/min)
41 gpm
(155 L/min)
44 gpm
(167 L/min)
53 gpm
(201 L/min)
7-500
0.5 gpm
(1.9 L/min)
13 gpm
(49 L/min)
22 gpm
(83 L/min)
38 gpm
(144 L/min)
50 gpm
(190 L/min)
55 gpm
(209 L/min)
59 gpm
(224 L/min)
70 gpm
(265 L/min)
7-700
0.5 gpm
(1.9 L/min)
13 gpm
(49 L/min)
25 gpm
(95 L/min)
43 gpm
(163 L/min)
57 gpm
(216 L/min)
62 gpm
(235 L/min)
66 gpm
(250 L/min)
77 gpm
(292 L/min)
7-900
0.5 gpm
(1.9 L/min)
13 gpm
(49 L/min)
30 gpm
(114 L/min)
55 gpm
(209 L/min)
76 gpm
(288 L/min)
84 gpm
(318 L/min)
89 gpm
(337 L/min)
104 gpm
(394 L/min)
7-1000
0.5 gpm
(1.9 L/min)
13 gpm
(49 L/min)
38 gpm
(144 L/min)
67 gpm
(254 L/min)
100 gpm
(379 L/min)
111 gpm
(421 L/min)
120 gpm
(455 L/min)
140 gpm
(531 L/min)
*Minimum ow rate when valve is installed at or near the hot water source with recirculated tempered water and continuously operating circulating pump.
**According to US Senate bill S.3874, the term “lead free” is dened as
follows: “not more than a weighted average of 0.25 percent lead when
used with respect to the wetted surfaces of pipes, pipe ttings, plumbing
ttings, and xtures”
Approach temperature:
5°F (2.8°C)
Temperature control range:
70°F - 150°F (21.1°C - 65.6°C)
-ASME A112.18.1/CSA B125.1, CSA B125.3
-ASSE 1017
-NSF/ANSI 61.9, NSF/ANSI 372
7-102 7-200, 7-400
7-500, 7-700
7-900, 7-1000

Table of Contents

Questions and Answers

  • E
    emily01Aug 7, 2025
    What to do if there is bypass in Symmons Control Unit?
    • H
      hdayAug 7, 2025
      If the Symmons Control Unit experiences a cold to hot or hot to cold bypass, it's likely that the checks are not seating properly. Try cleaning any fouled checks. If they are damaged, replace the damaged parts.
  • C
    Christopher GibsonAug 12, 2025
    Why does the temperature drop when using Symmons 7-400?
    • A
      Ashley GibbsAug 12, 2025
      If the temperature of your Symmons Control Unit drops during draw (when sinks or showers are running), it might be because the valve was set in no draw mode. To fix this, run the showers and sinks, and then set the valve.
  • P
    psellersAug 17, 2025
    Why is the Symmons 7-400 Control Unit temperature too low?
    • A
      Ashley AlexanderAug 17, 2025
      If the hot water temperature at your sink or shower is below the set point of the Symmons TempControl, it could be due to insufficient circulation of tempered water reaching the hot water source. To resolve this, consider re-piping the system according to diagram 2 or 3 (pg. 9), which allows the discharge of the pump (tempered water return) to go back to the hot water source and the cold inlet of the TempControl.
  • J
    Jose HortonAug 21, 2025
    Why is Symmons Control Unit overheating when not in use?
    • A
      Amber CamposAug 22, 2025
      If the thermometer in the Symmons TempControl outlet rises to the temperature of the heater when there's no draw (i.e., no sinks or showers running), it indicates that there is no circulation of tempered water because the return line is piped to the hot water source only. To fix this, re-pipe the system to diagram 2 or 3 (pg. 9), which allows the discharge of the pump (tempered water return) to go back to the hot water source and the cold inlet of the TempControl.
  • V
    Victor HernandezAug 27, 2025
    What to do if I cannot adjust the temperature on my Symmons 7-400?
    • T
      Tara VillaAug 27, 2025
      If you cannot elevate or decrease tempered water by turning the adjustment bolt on your Symmons Control Unit, the piston may be stuck with foreign matter. Remove the cartridge and soak it in household vinegar for an hour. If the piston does not free after soaking, replace the cartridge.
  • K
    knicholsSep 1, 2025
    Why does the temperature keep rising in Symmons 7-400?
    • V
      velezshannonSep 1, 2025
      If the temperature of your Symmons Control Unit rises unexpectedly, it could be because it's not piped according to Diagrams 2 or 3, or the ball valve is too far open. Ensure a check valve is installed on the cold supply to the controller, or adjust the ball valve as shown in diagram 2 or 3 on page 9.

Summary

Coordinating Model Numbers

Specifications

Technical specifications including temperature control range and approach temperature.

Compliance

List of standards and certifications the TempControl valve meets.

Warranty Information

Details on the warranty period for commercial installations.

Dimensions for 7-102

Dimensions for 7-200;400;500;700

Dimensions for 7-900;1000

Parts Breakdown for 7-102

Parts Breakdown for 7-200;400;500;700

Parts Breakdown for 7-900;1000

Installation Guidance

Tools Required for Installation

Lists essential tools needed for the installation process.

Technical Assistance and Sizing

Information on seeking help for sizing and technical support.

TempControl Location

Guidance on optimal placement of the thermostatic mixing valve.

Installation Tips

Key advice for proper installation procedures.

Piping Diagrams

Operation and Adjustment

Maintenance Recommendations

Instructions for cleaning and maintaining the valve cartridge.

Cartridge Removal & Replacement

Seasonal Use Precautions

Guidance on preventing freeze damage for seasonal applications.

Trouble Shooting Chart

Symmons 7-400 Specifications

General IconGeneral
BrandSymmons
Model7-400
CategoryControl Unit
LanguageEnglish

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