tekmar 326 Zone Expansion Module - Manual (Page 2)

© 2005 D 326 - 06/05 2 of 4
Sequence of Operation
24 V (ac) Powered Outputs
The 326 provides powered outputs for up to three 24 V (ac)
thermostats.
The 326 has limited power available. Refer to the Job
Records to determine the allowable load. If the load is too
large, refer to the Wiring Brochure to add additional power
to the system.
115 V (ac) Powered Outputs
The 326 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 the Zone relay is turned on.
• • If the Zone Group Pump DIP switch is set to On, the
Zone Group Pump LED and relay turn on.
• • If the Zone Group Pump DIP switch is set to Off, the
Zone Group Pump LED and relay are not turned on.
24 V (ac) R & C
115 V (ac) L & N
N N
Zone C1 Zone C2
65 66 67 68
Pump Pump
tN4
Meets Class B: Canadian
ICES & FCC Part 15
Made in Canada 10 A (max)
Zone Expansion Module 326
tektra 999-01
Relay Rating: 115 V (ac) 5 A
N
Zone C3
69 70
Pump N
Zone Group
71 72
Pmp C
Power
Zone Group Pump C
Zone C1
Zone C2
Zone C3
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
C tN4
Zn Grp C
C1
C2
On/Off
Zone Group
Pump C
C3
Limited power available, see wiring brochure
H7002B