tekmar 402 House Control Installation - Manual (Page 12)

© 2010 D 402 - 09/10 12 of 32
Description: The House Control 402 operates a modulating boiler with indirect Domestic Hot Water. Mixing is performed with
a three-way floating action mixing valve, which supplies a reset water temperature to four mix temperature hydronic zones.
Two boiler water temperature zones shown are operated by a Wiring Center through the tN4 Boil Expansion terminals.
Mix
Boil
DHW
(P3)
(P1)
(P2)
115 V (ac)
N L G
to pump grounds
L
Back of House Control 402
Strip wires
1/2 inch (13 mm).
Installed wires are
not removable.
12-18 AWG
R
C
L
N
Com
Open
Close
Expansion
tN4 Boil
Ct
N
4
Modulating
Boiler
—+
Expansion
tN4 Mix
Ct
N
4
(blue)
(red)
(black)
(black)
(black)
1
313
Menu
House Control 402
Item
+
Mix
Com
Boil
Out
DHW
Vlv C Vlv C Vlv C
Zone 3 Zone 1 Zone 2 Zone 4
Made in Canada
Vlv C
Com
Zone 1
H800
7B
Zone 2 Zone 3 Zone 4
tN2 tN2 tN2 tN2 tN2 tN2 tN2 tN2 C
Floating Action
Cls Opn
Sensors - No P
ow
er
Call
Call
tN4
tN4
CC
Mod dc/mA
Boil Exp.
Mix Exp.
Se
tpoint
DHW
Use at least 167°F
(75°C) conductors R C
Input Power
Stage 2
Stage 1
Boil System Pump
Mix System Pump
DHW Pump
Variable
Speed Pump
Pump Power L
402
070
313
Single Boiler, 2 Boiler Zones, DHW, 3 Way Mix, 4 Mix Zones A402-2
S3
S1 S2
S4
24 V (ac)
Transformer 009
Zone Valves (Z1 to Z4)
DHW Sensor (S4)
Boiler Sensor (S1)
Mix Sensor (S2)
tekmarNet ® 2 Thermostats
Outdoor
Sensor
(S3)
tekmarNet ® 4
Expansion to
Wiring Centers,
Timers, or
User Switch
tekmarNet ® 2 Thermostats tekmarNet ® 2 Thermostats
P1
P2
P3
Z1 Z2 Z3 Z4