HANDLING MANUAL
SERVICE MANUAL
RAYPAK HI DELTA BOILERS/WATER HEATERS
WITH FAN ASSISTED PREMIX BURNERS
13
1.5.3.
Systems below 105
0
C down to 40
0
C
The great mechanical strength and thermal-shock
resistance of the die-rolled copper finned tubes heat
exchanger makes Hi-Deltas ideal to operate in high
temperature systems.
Please consider thoroughly during the design and
installation of the complete system that even the tiniest
built-in part is able to withstand the overpressures,
temperatures, and chemical actions which could apply
during operation!
The residual heat must be removed from the heat
exchanger after the burners stop. Either could the pump
run continuously or intermittently so that it only starts
when there is a heat demand and stops after all burner
stages, overrunning for a time that can be adjusted on the
pump relay between 1-10 minutes.
The built in flow switch prevents the operation for the
burners of the Hi-Delta effectively if there is too little
flow through the heat exchanger.
The return temperature of the Hi-Delta ACE appliances
is not allowed to stay below 40 C during continuous
operation.
The return temperature of the Hi-Delta ACE appliances
with E8 option is not allowed to stay below 49 C during
continuous operation.