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14
14
INTEJAN CIRCULATOR
14.1
WATER CIRCULATION SYSTEM
Detailed recommendations for the water circulation system are given in BS 6798, BS 5449 (for small bore
and microbore central heating systems), and BS 5446. The maximum water side operating pressure (PMS)
is 1bar.
14.1.1 To ensure good circulation in gravity circuits, flow pipes should be designed to run vertically from
the water heater before running laterally. Any lateral run should be less than 2 x the previous vertical
run. Pipework should be installed with a rise towards the vent point. In systems with poor circulation,
a pump kit is also available.
14.1.2 Drain cocks must be located in accessible positions that permit the draining of the whole system,
including the appliance and hot water storage vessel. A drain cock should be fitted at the lowest
point of the water heating circuit and, in the case of an indirect system, another must be fitted at the
lowest point of the cold feed. Drain cocks should be at least
1
/
2
in nominal size and be in accordance
with BS 2879.
14.1.3 Economy valves can only be used in a DIRECT installation.
NOTE:
The circulator thermostat is factory set to provide a temperature range of 50°C to 82°C. The temperature is
increased by rotating the thermostat knob clockwise and temperature stop 2 MUST be left in position, see
Figure 11. If the circulator is used in a direct application, ensuring a maximum temperature of 60°C. For
indirect applications, remove temperature stop 2.
In order to ensure that soundness of the heater is maintained, you MUST ensure that flow and return pipes
into the sealed compartment are sealed with the supplied grommets!
14.2
WATER CONNECTIONS
NOTE:
Both flow and return connections are Rp¾ (¾” BSP female) connections.
IMPORTANT: Use compression fittings at the appliance flow and return connections and at the air heater casing
exit, to facilitate easy access to the circulator body.
14.2.1 Remove the fixing screws holding the sealing panel in place.
14.2.2 Carefully remove the sealing panel, such that access can be gained to the circulator compartment.
14.2.3 Knockouts/holes are provided in both sides of the heater cabinet for external pipe routing. Horizontal
pipe runs are to be kept to an absolute minimum.
NOTE:
In order to maintain an air tight seal, the supplied grommets MUST be used where the flow and return pipes
pass through the upper sealing plate and diaphragm.
IMPORTANT:
Ensure that the fittings on the circulator body are well supported when making flow and return connections.
FIGURE 10. TYPICAL INTEJAN DIRECT SYSTEM APPLICATION
FIGURE 11. POSITION OF TEMPERATURE STOPS
