Raypak HI DELTA HD101 THRU 2342B - Manual (Page 5)

5
Simple Serviceability
Raypak’s easy-to-understand user interface, including on-
board diagnostics and LED operating status lights, tells
the technician all he needs to know. All service/repair
components are readily accessible from the front for max-
imum installation flexibility.
Cold Water Start
It is commonly known that prolonged internal condensation will dramatically shorten the life of standard boilers and water heaters. While
Raypak boilers and water heaters can operate without harmful condensation at lower inlet water temperatures than the competition,
there are still applications that require reliable protection against harmful condensation caused by frequent, extended, cold water start-
ups. Raypak’s Cold Water Start protection system utilizes a proportional three-way valve to bypass water from the boiler outlet to the
inlet during start-up, when the system return water temperature is below the minimum acceptable level.
Cold Water Run
For the same reason stated for Cold Water Starts, it is even more important to provide protection against condensation from cold inlet
water on systems where the return water temperature to the boiler will always be below the acceptable minimum. Raypak’s Cold Water
Run system utilizes a variable-speed pump to inject just the right amount of water from the main system loop into the boiler to maintain
the optimum inlet temperature. This approach allows the full capacity of the boiler to be utilized to meet the system load, while at the
same time continuously maintaining the optimum inlet water temperature to prevent condensation.
(See Cat. #1000.19)
1 Diagnostic Control Center
2 Fenwal ignition control
3 Central point wiring board
4 Transformer
5 Pump delay relay
6 Manual reset high limit
7 Main power disconnect
8 Standby power switch
9 Status lights
Cold Water Start Cold Water Run
Cold Water Solution Options
3 1 2
4
5
9 8 7 6
Control Options
Raypak’s array of leading edge controllers offer features such as:
sequence-control of up to 40 boilers; PID technology; optimized
approach to outdoor reset; LonWorks or BMS interfacing; freeze pro-
tection and other energy-saving functions. Raypak’s controllers have
been specially designed to maximize the performance of its leading-
edge Hi Delta boilers.
TempTracker
Designed to sequence multiple boilers up to
four total stages, whether it’s one to four
on/off boilers, two two-stage boilers, or one
boiler with up to four stages. It is available
factory-mounted or loose.
(See Cat. 5100.22)
RayTemp
Demand-based set-point control maximizes
energy savings in domestic hot water appli-
cations (See Cat. 5100.18)
Y-200 Boiler Sequencer
Provides additional functionality for multi-
ple-boiler installations. Compatible with
LonWorks
® Building Management Systems
(BMS) (See Cat. #5100.22)