tekmar 325 Zone Expansion Module - Manual (Page 2)

© 2005 D 325 - 06/05 2 of 4
Sequence of Operation
24 V (ac) Powered Outputs
The 325 has an internal transformer that provides
powered outputs for up to six 24 V (ac) zone valves and
six thermostats.
The internal transformer has limited power available. Refer
to the Job Records to determine the load on the transformer.
If the load is too large for the transformer, refer to the Wiring
Brochure to add additional power to the system.
115 V (ac) Powered Outputs
The 325 has an internal relay that provides a powered
output for a zone group pump.
Refer to the Job Records to determine the allowable loads
for this relay.
Sequence of Operation
When a thermostat calls for heat, the Zone LED turns on
and power is supplied to the zone valve.
• • If the Zone Group Pump DIP switch is set to On and the
Zone Group Pump Delay DIP switch is set to Off, the
Zone Group Pump LED and relay turn on.
• • If the Zone Group Pump DIP switch is set to On and the
Zone Group Pump Delay DIP switch is set to On, the
Zone Group Pump LED and relay turn on three minutes
after the zone valve is powered.
• • If the Zone Group Pump DIP switch is set to Off, the
Zone Group Pump LED and relay are not turned on.
115 V (ac) L & N
N
Zone Group
89 90
Pmp C
tN4
Meets Class B:
Canadian ICES &
FCC Part 15
5 A (max)
Zone Expansion Module 325
tektra 998-01
Relay Rating: 115 V (ac) 5 A
24 V (ac) Fuse: T2.5 A 250 V
Power
Zone Group Pump C
H7001B
Zone C1
Zone C2
Zone C3
Zone C4
Zone C5
Zone C6
51 52 53 54 55 56 57 58 59 60 61 62
C C W W R R tN4 tN4 C W R tN4
tNt Zone C1 tNt Zone C2 tNt Zone C3
63 64 65 66 67 68 69 70 71 72 73 74
C C W W R R tN4 tN4 C W R tN4
tNt Zone C4 tNt Zone C5 tNt Zone C6
75 76
tN4 C
Zn Grp C
C2
C3
On/Off
Zone Group
Pump C Delay
Zone Group
Pump C
C4
C5
C6
C5
C6
C1
C1
C3
C2
C4
Limited power available, see wiring brochure
77 78 79 80 81 82 83 84 85 86 87 88
Zone C1 Zone C2 Zone C3 Zone C4 Zone C5 Zone C6
C Vlv C Vlv C Vlv C Vlv C Vlv C Vlv
Made in Canada