tekmar 371 House Control - Manual

1
D 371
07/96
The House Control 371 is a microprocessor-based control that provides individual tempera-
ture control for up to 5 zones. Each zone can be either connected to the boiler (hot water) loop
or to the mixing (warm water) loop. The supply water temperature to the zones is modulated
based on both the outdoor temperature and indoor temperature feedback from each of the
zones. This outdoor reset strategy reduces indoor temperature swings and increases system
efficiency. Other energy saving functions include a heating system Warm Weather Shut
Down (WWSD) and the ability to lower indoor temperatures for a night setback period. The
control has an Optimum Start / Stop function which automatically calculates when to bring
each zone out of night setback in order to ensure they are returned to their normal operating
temperatures as the setback period ends. The 371 allows integration of an indirect fired DHW
tank into the system. This helps provide faster DHW tank pick-up times and greater energy
savings. The control can also receive a setpoint demand on either the mixing loop or the boiler
loop for snow melting, hot tubs, or other loads.
Control Strategy ................... pg. 2 Testing the Control ...... pg. 16
Sequence of Operation ........ pg. 6 Error Messages ............ pg. 19
Installation ............................ pg. 10 Technical Data .............. pg. 20
Settings ................................. pg. 14 Limited Warranty .......... pg. 20
House Control 371
- Data Brochure
House Control 371
Five Zones, DHW, Boiler & Mixing
Power WWSD
Minimum
Boiler
DHW
Demand
System
Pump 1
Boiler
Zone 3
24 hr. Timer
• Dial the desired duration
of the UnOccupied period.
• Press start button at the time of day
you want the UnOcc. period to begin.
Timer Active light turns on.
Start
UnOccupied Duration
0 = always Occupied
24 = always UnOccupied
Maximum
Supply
Zone 2
Zone 4 /
Open
DHW
Pump Zone 1 /
Cooling
90
70
50
30
10
% of full
output
1
2
3
4
Setpoint
Demand
System
Pump 2
Zone 5 /
Close 5
70 ° F (21 ° C)
40
(4) 100
(38)
UnOccupied
LR 58223 N R T L / C
Occupied
Optimum Start / Stop
UnOccupied
Timer Active
0
12 hrs.
24
6 18
R
House Control 371
Five Zones, DHW, Boiler & Mixing
Test
H1
117 2
Made in Canada by
tekmar Control Systems Ltd.
N
2 3 4
P 1
5
Var.
Pmp
Power
L
Sys
12 13 14 15
130 ° F
Off 165
Min. Boiler
Supply
100
Power
Var. Pump
Relays 120 V 50/60 Hz 1500 VA
240 V 50/60 Hz 2.4 A 1/6 hp, fuse T2.5 A 250 V
120 V (ac) 3.2 A 1/4 hp, pilot duty 240 VA
Power WWSD
Minimum
Boiler
DHW
Demand
System
Pump 1
Boiler
Zone 3
26 27 25 28 29 30
Do not apply power here
31 23 24
1-2
Com
1 3-5
Com
70 ° F
(21 ° C)
40
(4) 100
(38)
UnOccupied
6 7 8 9 10 11
LR 58223
N R T L / C
R
Occupied
Optimum Start / Stop
UnOccupied
Timer Active 24 hr. Timer
0
12 hrs.
24
6 18
• Dial the desired duration of the
UnOccupied period.
• Press start button at the time of day
you want the UnOcc. period to begin.
Timer Active light turns on.
Start
0.2
2
3.6
1
3
Heating Curve
16 17 18
Com
Sen
RTU
1
RTU
2
Com
Sen
RTU
3
RTU
4
RTU
5
Com
Sen
UnO
Sw
Zo
In
Com
Sen
Boil
Sen Sup
Sen
22 20 21
Boiler Pmp
DHW Setp
Dem Dem 2 3 4
Caution: Signal wiring must be rated at least 300V
Max. Supply / Setpnt
120
170 ° F
220
UnOccupied
Duration
0 = always Occupied
24 = always UnOccupied
Maximum
Supply
Zone 2
Zone 4 /
Open
DHW
Pump Zone 1 /
Cool
90
70
50
30
10
% of full
output
1
2
3
4
PRGM
S
T I M E AMPM UNOCC OVR S M W T F T
1
2
LR 58233 E150539
70 70
70
70
Setpoint
Demand
System
Pump 2
Zone 5 /
Close 5
0.2
2
3.6
1
3
Boiler Heating
Curve
1
P 2
Sys
19
Out
Sen
DHW
5
Opn Cls
M
70
Occ/UnOcc
Permitted
1,2 4 3
Occ. only
5 Setpnt
Boiler
Mixing
1 2 3 4 5 Zo
Off
Zone 1 Heat
Zone 1 Cool
Floating
DHW during UnOcc.
Var. Speed
Optimum Start
Thermal Motor
Zone
M
OR
Input
120 V (ac)
Power
Supply
Input
tekmar Zone
Control
Output
Mixed System
Pump
Output
Boiler
Input
Outdoor
Sensor Included
Inputs
Universal
Sensors Included
Input
tekmar RTUs or
Indoor Sensors
Input
Setpoint
Demand signal
Output
Var. Speed
Driven Pump
Output
Zone Valves or Zone
Pumps
Output
DHW
Pump
Input
tekmar
Timer
Output
Boiler System
Pump
Input
DHW
Demand signal
Output
Mixing Valve &
Actuating Motor
Output
Cooling
OR