Hydronic M-II (Water Heater) - Espar

Installation Procedures
Fuel System
The Hydronic MII boxed unit is most commonly provided with the
fuel metering pump mounted inside the box. This is to reduce
installation time and to protect the pump from corrosion. If specifications
cannot be met the pump must be mounted externally.
See illustration for connections and specifications. All parts
necessary to do the installation are included in the kit as shown.
Note: Fuel line limits must not be exceeded.
Ensure that the following conditions are met.
Fuel System Tolerances
12
Bottom of the fuel metering pump must be within a height
of 2ʼ6” of the bottom of the fuel pick-up pipe.
Fuel metering pump must be within a total distance of
6ʼ6” from the fuel pick-up pipe.
Pressure runs of less than 1.3 mtrs (50”) use only 3.5mm
rubber (360 75 300)
Control and Safety Devices
Emergency shutdown – EMERGENCY OFF
If an emergency shutdown – EMERGENCY OFF – is necessary
during operation, proceed as follows:
• Switch the heater off with the control
• pull the fuse out
• disconnect the heater from the battery.
Max. 2ʼ6”
FUEL
TANK
Max. 6ʼ6”
2
Max. 6ʼ6”
3
1
2
4
Max. 20”
6
5
Fuel Line
• Route fuel lines from the fuel pick-up pipe to the heater.
• Use Espar approved fuel lines.
• Other sizes or types of fuel lines may inhibit proper fuel flow.
• Make proper butt joints using clamps and connector pieces
as shown
• Use a sharp utility knife to cut plastic fuel lines to avoid burrs.
7
Note: Butt joints and clamps on all connections.
6
5
1. Fuel Pick-Up Pipe
2. 11mm Clamp
3. 5.0mm Fuel Line
4. Fuel Metering Pump
5. 9mm Clamp
6. 3.5mm Rubber Connector
7. 2.0mm White Plastic Fuel Line
See notes if length is less than
1.3 mtr (50”)