Mitsubishi Heavy Industries HMK60, Installation Manual

Page: 248 / 288

42
Commissioning and adjusting
CAUTION
Open the hot water intake valves before heating the system
up for the first time or after a longer break in its operation
in order to check whether the storage tank is filled with
water and the cut-off valve at the cold water inlet is not
closed.
Climate system
1. Open the vent at the top of the heating system.
2. Open all shut-off valves, where installed, so that water fl ows
into all circuits.
3. Open the valve for fi lling the heating circuit and fi ll it with
water.
4. Close the vent when water comes out continuously without
bubbles.
5. Check the manometer and close the fi lling valve when the
pressure reaches the required value (2 bar is recommended).
6. Start the circulation pump of the heating system, and open
the vent from time to time and release the all remaining air
in the heating system.
7. Open safety valve until the pressure of the heating system
drops down to about 1 bar. If the pressure drops below 1 bar
during venting, add additional water in the circuit.
Inspection of installation
Current regulations require that the climate system is inspected
before it is commissioned. The inspection must be carried out
by a suitably qualifi ed person and must be documented. Do not
replace any part of the system without carrying out new
checks.
Commissioning and adjusting
Preparations
Before starting commissioning, check the followings;
The signal cable is connected between indoor unit and
outdoor unit as well as indoor unit and controller according
to the instruction.
The power cable is connected to indoor unit, outdoor unit
and controller according to the instruction.
Operation switch in controller is in the position .
The service valves on outdoor unit (QM35 and QM36) are
open.
Drain valve is closed before fi lling water in the system.
Temperature limiter and electrical switch are not tripped.
The system is fi lled with water and well vented.
There are no leaks on the water pipe.
Filling and venting
Hot water tank
1. Open the hot water tap as well as venting valve if applicable,
and then open the cold water cut-off valve at the inlet.
2. Fill the storage tank until obtaining uniform water outfl ow at
the hot water tap, and then close the hot water tap and
venting valve.
3. Fill the water heater coil in the tank. See Climate system for
details.
After the installation and levelling the tank, follow the
procedure below (for the connector pipe symbols, refer to page
18):
1. Remove protecting plugs from the connector pipes
2. Connect the hot water intake line (N).
3.
Connect the cold water supply line together with the
required safety valves (G).
4. If the system has the hot water circulati on system, connect
it to the connector pipe (L). Otherwise, plug the pipe.
5. Connect the supply (J) and return (H) of the heating medium
to the coil.
CAUTION
If there is an electric heating module installed in the
storage tank, fill the tank with water before connecting
it to the electrical installation.