2.5
BOILER INSTALLATION
At the time of installation, the following steps should be
followed.
1. Choose an appropriate location. Mount the boiler
securely on the wall with the help of the mounting
plate. Ensure that it is level and that the minimum
clearances are observed;
2. Install the drain valve and the safety valve;
3. An automatic air vent should be installed on the
unit;
4. Install the water supply and return piping with the
2” NPT fittings;
5. The heating supply line must include:
(a) 1 circulator along with 2 maintenance valves;
(b) 1 automatic pressure reducing valve adjusted
to 12 psi, with a shut-off valve on the return
water line;
(c) 1 expansion tank;
(d) 1 automatic vent.
6. In order to ensure satisfactory water flow, the
friction in the piping system must not exceed the
capacity of the circulator;
7. After having completed all piping connections, run
water through the system and purge the air. An
automatic vent should be in operation.
Note
: Remove the top cover and check to see if the
elements are watertight.
2.6
ELECTRIC POWER SUPPLY
All electrical wiring must conform to the standards and
regulations in force and to the Canadian Electrical Code
CSA C22.1.
Electric power to the boiler must come from a 120/240V
60 Hz or 208V 60 Hz, single phase, grounded circuit,
protected by an appropriately sized breaker, based
on the total rating of the boiler.
Refer to the boiler
nameplate and the technical specifications in this manual
to select the proper breaker and wire size. Normally,
3
conductors
are required. If the circulating pump has an
external power source, and if no other accessory requires
the 120V output from the boiler, only
2 conductors
can
be used. Use cable rated at 60°C or higher.
When using 208V, change the connector’s position at the
primary of the transformer.
Make sure to turn off all electrical circuits when
working in the appliance.
WARNING
F
IRE HAZARD
The conductor sizing must conform to the last
edition of the local or national codes.
Power supply to the unit can be made using copper
or aluminum wires. The wire size must be decided in
accordance to unit power consumption, the over current
protection type and capacity, the wire type and length,
and the environment where the unit is installed. If an
aluminum wire is used, other precautions (such as the
use of a DE-OX inhibitor) must be taken to insure the
conformity of the installation. In all cases, all the factors
affecting the wire gauge must be considered and the
installation codes followed.
The exterior of the unit must have an uninterrupted
ground to minimize the risk of bodily harm. A ground
terminal is supplied with the control box for that purpose.
It is highly recommended to have a surge protector
installed on the boiler.
In
the
event
that
wires
inside
the
unit
require
replacement, these must be as same type as originals
(copper wiring only).
2.6.1
Connecting the Circulation Pump
Connect the circulating pump on connection points
identified P-P in series with the power source. The relay
is limited to 400 VAC 5 amps. The electronic control
is designed to operate the circulator on thermostat
demand, with a heat purge delay at the end of heating
cycle or continuous flow. Refer to the electronic control
section to learn how to configure this function.
2.6.2
Power Stealing Thermostat
A 150 OHMS - 10W must be installed if a power stealing
thermostat is used. This resistance must be connected
to C-W, as shown in figure 2.
7
Summary of Contents for HYDRAI016-208-3
Page 11: ...Figure 4 Menu Navigation 11 ...
Page 12: ...Figure 5 Modulation as Function of the Outdoor Temperature 12 ...
Page 16: ...Figure 6 Boiler Dimensions Figure 7 One Boiler Installation Schematic 16 ...
Page 17: ...Figure 8 Multiple Boilers Installation Schematic 17 ...