Installation – tekmar 370 House Control User Manual
Page 10
Copyright © D 370 -06/99
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Individual Zone Selection
The DIP switches on the 370 are used to select which zones are switched into
UnOccupied mode. If the DIP switch for a specific zone is set to
Occ / UnOcc, that zone
is switched into UnOccupied mode whenever the 370 receives an UnOccupied signal. If
the DIP switch for a specific zone is set to
Occ. only, that zone remains in the Occupied
mode at all times.
Optimum Start / Stop
The Optimum Start / Stop feature is enabled when the DIP switch is set to
Optimum Start.
The 370 turns on the
Optimum Start / Stop light each time the first zone enters its delay
or recovery period. Either the tekmar Timer 031 or the built in 24 hr. Timer on the 370 can
be used with the Optimum Start / Stop feature. The tekmar Timer 031 has a DIP switch
which must be set to
Optimum Start / Stop in order to synchronize the timer with the 370
Optimum Start / Stop function.
SYSTEM PUMP OPERATION
The
System Pump light is turned on every time the relay contact between terminals Sys Pmp — Power L (1 & 3) is closed.
During heating operation, the system pump operates whenever any zone requires heat.
This includes zones in an external tekmar Zone
Control. If thermal motor zone valves are used, the system pump is held off for the first three minutes of the zone cycle in order to give the
zone valve sufficient time to open. The system pump may also operate for an additional purge period once the zone relays are turned off.
When in Boiler Operation and Dip Switch set to DHW. For other details of the operation of the system pump during DHW operation,
see the DHW section on page 7.
Pump / Valve Exercising
The zone valves, zone pumps and system pump are exercised to help prevent corrosion from building up and subsequently jamming
the equipment. Every three days the 370 runs through an exercising procedure.
Exercising procedure
The 370 first exercises the zone valves or pumps. If a zone valve or zone pump has not been operated in the past 3 days, the 370
turns on the zone relay for 10 seconds.
Note The zone relay exercising time is increased to 3 minutes if the DIP switch is set to
Thermal Motor.
After the zone valves or pumps have been exercised, the 370 exercises the system pump. If the system pump has not operated
in the past 3 days, the 370 turns on the
Sys Pmp relay for 10 seconds.
After the system pump has been exercised then, if the DIP switch is set to
Mixing and the variable speed injection pump has not
operated in the past 3 days, the 370 turns on the variable speed injection pump at full speed for 10 seconds.
Once the exercising procedure is complete, the 370 returns to its normal operating sequence.
Installation
Caution
Improper installation and operation of this control could result in damage to the equipment and possibly even personal injury.
It is your responsibility to ensure that this control is safely installed according to all applicable codes and standards. This
electronic control is not intended for use as a primary limit control. Other controls that are intended and certified as safety
limits must be placed into the control circuit.
STEP ONE
GETTING READY
Check the contents of this package. If any of the contents listed are missing or damaged, please contact your wholesaler or tekmar sales
representative for assistance.
Type 370 includes:
• One House Control 370
• One Outdoor Sensor 070
• Two Universal Sensors 071
• Data Brochures D 370, D 070, D 001
• Application Brochures A 370
• Essay E 021
Other information available:
• Essays
Note Carefully read the details of the Sequence of Operation sections in all applicable brochures to ensure that you have chosen the
proper control for your application.
STEP TWO
MOUNTING THE BASE
Remove the control from its base by pressing down on the release clip in the wiring chamber and sliding the control upwards. The base
is then mounted in accordance with the instructions in the Data Brochure D 001.
Occ/UnOcc
1
4
3
Occ. only
2
Off
Optimum Start
Installation