Oil Supply - Dettson HMR Installation Instructions And Homeowner's Manual

Figure 3: "HM2" boilers with or without sanitary hot water
coil and with a 20 cm (8") flue-pipe. The models
are identified as HM-185, HM-212, HM-240, HM-
266 and HM-293. Available with the Beckett and
Riello burners.
.
Each of these boilers has its own characteristics: location of return and
supply pipes, sanitary hot water coil, relief valve and thermo
manometer, diameter of the flue-pipe, etc.
1.3) DELIVERY
Carefully check your boiler upon delivery for any evidence of
damage that may have occurred during shipping and handling. Any
claims for damages or lost parts must be made with the Transport
Company.
1.4) INSTALLATION
Your unit must be installed according to regulations as set out by
competent authorities. Refer to the CSA B139 Installation Code.
1.4.1) Positioning
The boiler must be installed in a clean and dry area, as closely as
possible to a chimney. The boiler is NOT approved for installation on
a combustible floor.
The unit must be installed in a location where the ambient
temperature is over 15°C (60°F).
1.4.2) Clearances
The following minimum clearances from combustible surfaces must
be observed:
Top:
Flue-pipe:
One side:
Other side:
Front (from the cabinet)
Rear:
1.5) WIRING
The boiler must be connected to a 15 amp / 120 Vac protected
circuit. The installer must wire the boiler according to the appropriate
electrical diagram. Refer to typical wiring diagrams, Figures 5.1 to
5.5. All wiring must be in accordance with the "Canadian Electrical
Code" CSA C22.1/ Part I.
Model
HMR
HMT
HM2
4
22.86 cm (9")
22.86 cm (9")
7.62 cm (3")
0.60 m (24")
0.60 m (24")
7.62 cm (3")
Chimney size
Minimum Maximum
12.70 cm (5") 15.24 cm (6")
12.70 cm (5") 15.24 cm (6")
17.78 cm (7") 20.32 cm (8")
Always select the wiring diagram based on the
distribution system (piping) and whether or not the
boiler has a sanitary hot water coil.
"HMR – HMT – HM2" boilers with integrated by-pass are designed for
installation on any type of distribution (piping) system that is equipped
with a circulating pump such as finned tube baseboard and cast iron
radiators as shown in Figure 4. The integrated by-pass permits a
stabilisation of the temperature rise between the supply and return
pipes to approximately Δ11
temperature. In
condensation in the boiler when using the circulator contact available
on the boiler aquastat.
This way, thermal shocks in the pipes are eliminated, off-cycling of the
circulator is reduced and water temperature throughout the system is
better controlled.
If more than 1 circulator is used, we recommend the use of an RC-02
circulator control.
1.6)

OIL SUPPLY

The installation of the oil tank and lines must be in accordance with
local codes and regulations. The burner can be hooked up to a one
pipe system if the oil level in the tank is always above the burner. On
an outside, above ground fuel tank hook-up, a one pipe system with a
nominal dimension of 1.3 cm (½") diameter is ideal. Be sure to install
the oil filter and at least 3 m (10') of piping inside the building, to allow
the fuel oil to warm up in very cold weather, before reaching the
burner.
The oil pump configuration is for a 1 pipe system. Insert the by-pass
plug for a 2 pipe system (refer to the manufacturer's Instruction
Manual).
The installation must include an oil filter and a shutoff valve. Ensure
that the piping has no leaks and that there are no obstructions. Do
not use couplings or compression fittings on oil lines. On a two pipe
system, use the same diameter pipe for both the suction and the
return lines and set them at the same depth in the oil tank.
Additional information can be found in the burner installation manual
provided with your boiler.
Check the entire oil distribution system for leaks at the beginning of
each heating season.
TABLE 1
Chimney draft
Connecting pipe
12.70 cm (5")
15.24 cm (6")
20.32 cm (8")
CAUTION
o o
C (Δ20 F), whatever the return
addition, the integrated by-pass
Recommended draft
8.71Pa (0.035")
8.71Pa (0.035")
12.44Pa (0.050")
prevents