Toshiba HWS-802XWHM3-E, HWS-802XWHT6-E, HWS-802H-E Exchange parts name, Work procedure, Remarks

No.	Exchange parts name			Work procedure		Remarks
9	Expansion vessel					Expansion vessel
		To replace a water circuit part, first close the water
		supply source valve and the valve of water pipe
		connected to the hydro unit.
		1)Perform the step 1-1, step 5, 6, and 7.
		2)Remove the fixed band of the expansion vessel.
		(ST1T Ø4 × 8, 4 screws)
		3)Remove the expansion vessel connection (three-
		piece flare nut).				Expansion vessel
		Replace the packing to new one when installing the				Fixed band
		expansion vessel.
			Part code		Service parts
			37595721		Service packing assembly
		After the expansion vessel replacement repair,
		open the water supply source valve and water
		piping valve to pass water through the hydro unit,
		and check that the expasion vessel connection has
		no water leakage.				Replace the packing to
						new one when installing
						the expansion vessel.
10	Relief valve
		To replace a water circuit part, first close the water				Relief valve connecting hose
		supply source valve and the valve of water pipe				Internal diameter: 15mm, Length: 850L
		connected to the hydro unit.				Relief valve
		1)Perform the step 1-1, step 5, 6, and 7.
		2)Remove the quick fastener.
		3)Remove the relief valve by pulling it upward.
		The relief valve connection uses an O ring for water
		seal. Be careful not to scratch the O ring; otherwise,
		water leakage may occur.
						Quick
		After the relief valve replacement repair, open the
		water supply source valve and water piping valve to				fastener
		pass water through the hydro unit, and check that
		the relief valve connection has no water leakage.

11 Air vent valve

To replace a water circuit part, first close the water	Air vent valve
supply source valve and the valve of water pipe
connected to the hydro unit.
1)Perform the step 1-1, step 5, 6, and 7.
2)Remove the air vent valve.
After the air vent valve replacement repair, open the
water supply source valve and water piping valve to
pass water through the hydro unit, and check that
the air vent valve connection has no water leakage.

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