tekmar 374 Universal Reset Control - Manual (Page 23)

23 of 36 © 2009 D 374 - 03/09
The control’s exterior can be cleaned using a damp cloth. Moisten the cloth with water and wring out prior to wiping the control. Do
not use solvents or cleaning solutions.
Cleaning The Control
Dip Switch Settings
GENERAL
The DIP switch settings on the control are very important and should be set
to the appropriate settings prior to making any adjustments to the control
through the User Interface. The DIP switch settings change the items that
are available to be viewed and / or adjusted in the User Interface.
If a DIP switch is changed while the control is powered up, the control responds
to the change in setting by returning the display to the VIEW menu.
Advanced / Installer
The Advanced / Installer DIP switch selects the access level of the
control. In the Installer access level, a limited number of items may be
viewed and / or adjusted. In the Advanced access level, all items may
be viewed and / or adjusted.
Setback / Off
The Setback / Off DIP switch selects whether or not the internal
setback timer and schedule is to be used. If the switch is set to
Setback, the timer must be set and the setback schedule must be
entered to provide setback events.
15 16
13
17
Mix1
P2
Power
N L
Prim
P1
Mix2
P3
14
DIP Switches
Universal Reset Control 374
Boiler Demand
Mix 1 Demand
Mix 2 Demand
DHW Demand
Setpoint Demand
Test
off not testing red testing red testing paused
For maximum
heat, press &
hold Test for 3
seconds
Made in Canada by tekmar Control Systems Ltd.
Power: 115 V ±10% 50/60 Hz 1700 VA Relays: 230 V (ac) 5 A 1/3 hp, pilot duty 240 VA Variable Pump: 230 V (ac) 2.4 A 1/6 hp, fuse T2.5 A Demands: 20 to 260 V (ac) 2 VA
Boiler Sensor
Variable Off Supply Installer
Advanced Setback 30% Enable
10% Enable
Return
Rotation Floating
Menu Item
eset Control 374
seconds
Made in Canada by tekmar Control Systems Ltd. y
Power: 115 V ±10% 50/60 Hz 1700 VA Relays: 230 V (ac) 5 A 1/3 hp, pilot duty 240 VA Variable Pump: 230 V (ac) 2.4 A 1/6 hp, fuse T2.5 A Demands: 20 to 260 V (ac) 2 VA
u Item
Universa
Boiler Demand
Mix 1 Demand
Mix 2 Demand
DHW Demand
Setpoint Demand
off not testing red testing red testing pausedd
For maximum
heat, press &
M
10% Enable
Boiler Sensor
Variable
Off
Supply Installer
Advanced
Setback
Return
Rotate Floating
30% Enable
30% Enable
10% Enable
Boiler Sensor
Variable
Off
Supply Installer
Advanced
Setback
Return
Floating Rotate
Mix 2
If a floating action actuating motor circuit is connected to the Pwr Mix, Opn and Cls Var2 terminals (3, 4 and 5), make sure
power to the motor circuit is off and install a jumper between the Pwr Mix and Opn terminals (3 and 4). When the circuit is
powered up, the actuator should move in the opening direction. If it does not, check the wiring between the terminals and
the actuating motor. Refer to any installation or troubleshooting information supplied with the motor. If the motor closes
instead of opening, the wiring of the actuating motor must be reversed. If the valve opens correctly, turn off the power to
the circuit and remove the jumper. Install a jumper between the
Pwr Mix and Cls Var2 terminals (3 and 5). When the circuit
is powered up, the actuator should move in the closing direction. If it does not, check the wiring between the terminals and
the actuating motor. Refer to any installation or troubleshooting information supplied with the motor. If the motor closes
correctly, turn off the power to the circuit and remove the jumper.
Connecting the Control
Make sure all power to the devices and terminal blocks is off, and remove any remaining
jumpers from the terminals.
Reconnect the terminal blocks to the control by carefully aligning them with their
respective headers on the control, and then pushing the terminal blocks into the headers.
The terminal blocks should snap firmly into place.
Install the supplied safety dividers between the unpowered sensor inputs and the
powered or 115 V (ac) wiring chambers.
Apply power to the control. The operation of the control on power up is described in the
Sequence of Operation section of the brochure.