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Copyright © D 363 -06/99
Variable Speed Injection Pump
The 363 can vary the speed of a permanent capacitor, impedance protected or equivalent
pump motor that has a locked rotor current of less than 2.4 A. Most small wet rotor
circulators are suitable as described in Essay E 021. The 363 has an internal overload
protection fuse which is rated at 2.5 A 250 V (ac). Contact your tekmar sales representative
for details on the repair procedure if this fuse is blown.
Connect one of the wires from the variable speed injection pump to the
Cls / Var terminal (16) on the 363. Connect the Pwr Mix terminal (14)
to the live (L) side of the 120 V (ac) power source. The other wire on
the variable speed injection pump must be connected to the neutral (N)
side of the 120 V (ac) power supply.
Variable Speed Injection Pump (STORAGE)
If using the
STORAGE
function in the control, the variable speed signal
from the control must be wired through an external relay. This relay
must have a 120 V (ac) coil and at least one normally open and one
normally closed contact (e.g. tekmar relay 004). The relay’s coil is to be
connected between the
Opn terminal (15) on the 363 and the 120 V (ac)
neutral (N). The common pole of the relay is to be connected to the
Cls
/ Var terminal (16) on the 363. The storage tank’s injection pump is to
be connected between the normally open contact and the 120 V (ac)
neutral (N). The boiler’s injection pump is to be connected between the
normally closed contact and the 120 V (ac) neutral (N). An example of
the correct wiring using a 120 V (ac) double pole, double throw (DPDT)
relay is shown to the right.
Mixing Valve Actuator
Connect one side of the 24 V (ac) power to the
Pwr Mix terminal (14)
on the control. The output relay
Opn terminal (15) is then connected to
the open terminal of the actuating motor and the output relay
Cls / Var
terminal (16) is connected to the close terminal of the actuating motor.
Connect the second side of the 24 V (ac) power to the common terminal
of the actuating motor.
Sensor and Unpowered Input Connections
Do not apply power to these terminals as this damages the control.
Outdoor Sensor
Connect the two wires from the Outdoor Sensor 070 to the
Com and
Out terminals (23 and 26). The Outdoor Sensor is used by the 363 to
measure the outdoor air temperature.
Boiler Sensor
Connect the two wires from the Boiler Sensor 071 to the
Com and Boil
terminals (23 and 25). The Boiler Sensor is used by the 363 to measure
the supply (outlet) water temperature from the boiler.
Mixing Sensor
Connect the two wires from the Mixing Sensor 071 to the
Com and Mix
terminals (23 and 24). The Mixing Sensor is used by the 363 to
measure the supply water temperature after the mixing device. Nor-
mally the sensor is attached to the pipe downstream of the mixing pump
(P2).
10K 1 Sensor
Either an Indoor Sensor, Slab Sensor, or Zone Control may be
connected to the
10K 1 input. If a sensor is used, connect the two wires
from the sensor to the
Com and 10K 1 terminals (20 and 21).
Installation, Electrical
23
24
Com Mix
Mixing
sensor
23
24
Com
Mix
Boil
25
26
Out
Boiler
sensor
23
24
Com
Mix Boil
25
26
Out
120 V (ac)
3
4
6
5
7
2
1
8
14 15
Pwr
Mix
Opn Cls/
Var
16
L
N
20
21
Com 10K
1
14
15
Pwr
Mix
Opn
Cls/
Var
16
120 V (ac)
L
N
14 15
Pwr
Mix
Opn Cls /
Var
16
Com
C
R
