Drain Coolant - Graco 259079 Operation Manuals

Drain Coolant

To avoid burns, do not perform maintenance on
the coolant system until the coolant system has
reached ambient temperature.
Drain coolant from the engine and proportioner
coolant loops once a year or if the coolant lines need
to be disconnected, in order to install a wall between
the generator and proportioner.
1. Perform Shutdown, page 63.
2. Remove the cabinet door from the front of the
proportioner.
3. Turn on manual valve switch (MV), located on
the load center (LC), to manually open the A
and B heat exchanger control valves and bypass
control valve.
Note
The battery must be connected to
operate valves. The load center (LC)
LEDs will stay on when the manual valve
switch (MV) is in the ON position.
Figure 39
3A1705E
LC
MV
LED Component
Manual valve switch (MV) Red
A Side Control Valve
B Side Control Valve
Bypass Valve
4. To drain proportioner coolant loop:
a. Remove the proportioner coolant loop fill
bottle (HF) cap.
b. Place the other end of the drain tube in a
waste container. Open the drain valve. Drain
coolant until coolant is no longer visible in
the sight glass.
Proportioner Coolant Loop Drain Valve
Figure 40
c. To refill coolant loop, see Refill Proportioner
Coolant Loop, page 70.
Maintenance
LED Color
Red
Blue
Green
69