Camus Hydronics DRW1000, Installation And Service Manual

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appliance. The connection to the appliance marked “Inlet”
on the header should be used for return from the system.
The connection on the header marked “Outlet” is to be
connected to the supply side of the system.
4.4 MINIMUM PIPE SIZE REQUIREMENTS
The equivalent number of straight feet of pipe for each valve and
fitting in the connecting piping must be considered to properly
arrive at the total equivalent feet of straight pipe in the field
installed piping to the appliance. See the piping requirements in
Part 11 - Installation section of this manual. Consult factory if
longer piping distances are required for a specific application.
4.5 HEAT EXCHANGER
This appliance uses stainless steel fin tubing to maximize the
heat transfer process. The heat exchanger is comprised of
vertical tubes welded directly into two circular stainless steel
headers. This heat exchanger is designed to withstand 160
PSIG working pressure. A series of “V” shaped baffles are
installed between the individual tubes to control the movement
of the flue products over the finned tubes to maximize
efficiencies. When servicing, take special care to ensure that
baffles are properly located and maintained in factory condition.
Replace any damaged baffles including factory supplied
ceramic facing tape.
A factory recommended circulating pump ensures proper water
flow during burner operation and creates enough water
turbulence inside the stainless steel tubes and header that
prevents the formation of sediments. Temperature rise and
scale formation in the heat exchanger are controlled by the
selection of a properly sized circulating pump.
The Camus® designs are versatile and user friendly, they
deliver optimal performance by taking full advantage of existing
site conditions in order to maximize energy savings.
4.6 LOW WATER TEMPERATURE SYSTEMS
In applications where the heating system requires supply water
temperatures below 110°F, connections may be made directly
to the Dynaforce®. At incoming temperatures of 80 o F or lower
the Dynaforce® achieves maximum efficiency. Inlet
temperatures must not drop below 40 o F to prevent freezing.
4.7 INSTANTANEOUS WATER HEATER
An instantaneous water heater is designed to deliver hot water
without the use of a storage tank. It is suitable for applications
with variable load such as restaurants, condominiums,
apartments and motels and typically used in conjunction with
tempering valves to achieve temperature control. In some
applications it may be appropriate to provide a flow through tank
to act as a buffer. Consult factory for recommendations. (See
Figure 18)
Figure 18: Typical Instantaneous Water Heating System
Table 8: Flow and Pressure Drop at a Given Temperature
Rise (DR300-1400) – Hydronic Boiler
Size Output
Max
Btu/hr
10°F 15°F 20°F 25°F
Flow
(GPM)
∆P -Ft. Flow
(GPM)
∆P -
Ft.
Flow
(GPM)
∆P -
Ft.
Flow
(GPM)
∆P -
Ft.
300 282,000 56.6 7.5 37.8 3.2 28.3 1.9 -- --
350 329,000 66.1 10.9 44.1 4.7 33.0 2.6 -- --
400 375,060 75.5 14.7 50.4 7.3 37.8 4.3 -- --
500 470,000 93.9 23.5 62.6 9.8 47.0 6.2 -- --
600 564,000 112.7 25.1 75.1 10.7 56.3 6.7 -- --
800 752,000 150.3 46.0 100.2 20.5 75.1 10.7 -- --
1000 940,000 187.8 70.0 125.2 31.0 93.9 18.0 75.1 11.4
1200 1,137,600 227.3 102.8 151.6 45.5 113.7 25.8 90.9 16.7
1400 1,327,200 265.2 121.4 176.8 55.7 132.6 31.3 106.1 20.2
Table 9: Flow and Pressure Drop at a Given Temperature
Rise (DR1600-5000) – Hydronic Boiler
Size Output
Max
Btu/hr
25°F 30°F 35°F 40°F
Flow
(GPM)
∆P -
Ft.
Flow
(GPM)
∆P -
Ft.
Flow
(GPM)
∆P -
Ft.
Flow
(GPM)
∆P -
Ft.
1600 1,516,800 121.2 19.2 101.0 13.0 86.6 9.7 75.8 7.3
1800 1,706,400 136.4 24.5 113.7 16.6 97.4 12.0 85.2 9.0
2000 1,896,000 151.6 26.5 126.3 18.9 108.3 13.7 94.7 10.3
2500 2,362,500 188.8 70.5 157.4 49.7 134.9 37.2 118.0 28.0
3000 2,835,000 226.6 63.4 188.8 43.6 161.9 32.2 141.6 25.6
3500 3,307,500 264.4 52.6 220.3 37.0 188.8 27.4 165.2 20.9
4000 3,780,000 302.2 68.5 251.8 49.0 215.8 35.5 188.8 27.4
4500 4,252,500 339.9 69.9 283.3 49.4 242.8 37.5 212.4 28.0
5000 4,725,000 377.7 92.6 314.7 68.9 269.8 51.0 236.1 39.1
4.8 WATER FLOW SWITCH
A water flow switch is mounted and installed in the outlet piping
on all heating boilers and hot water supply boilers. The flow
switch is wired in series with the 24VAC safety control circuit.
4.9 LOW WATER CUTOFF (If Equipped)
If this boiler is installed above radiation level, a low water cut-off
device must be installed at the time of boiler installation. Some
local codes require the installation of a low water cut-off on all
systems. Electronic low water cut-offs are available as a factory
supplied option on all models. Low water cut-offs should be
tested every six months, including flushing of float types. The
normally open switch contact of the low water cutoff is to be
wired in series with the flow switch. A red diagnostic light will be
indicated on the control display on a low flow condition.
Caution : remove jumper when connecting to 24 VAC circuit.