Rheem 50 Manuel de service télécharger pdf (Page 24)

MULTIPLE INSTALLATIONS

A multiple installation of Rheem water heaters on a single manifold or multiple manifolds is possible, using

the Rheem Equa-Flow

manifold system, where large volumes of hot water is required. The Equa-Flow

principle will function with water heaters in line, around a corner or in rows back to back (refer to the

diagrams on page 25).

The cold water and hot water manifolds must be designed to balance the flow from each water heater. To

achieve this, there are basic installation requirements and principles which must be followed:

1. The maximum number of water heaters in a bank should be 8, however several banks of water heaters

can be installed.

2. The hot water line from the manifold must leave from the opposite end to which the cold water line

enters the manifold.

3. The water heaters must be of the same model.

4. The cold water line, cold and hot headers and hot water line must be sized to meet the requirements of

both AS/NZS 3500.4 and the application.

5. A non return valve, isolation valve and if required a pressure limiting valve and expansion control valve,

must be installed on the cold water line to the system.

6. A full flow gate valve or ball valve (not a stop tap, as used on a single water heater installation) must be

installed on both the cold water branch and hot water branch of each water heater.

7. Non return valves or pressure limiting valves must not be installed on the branch lines to the water

heaters.

8. All fittings, valves and branch lines must be matched sets all the way along the manifold.

9. Sufficient space must be left to enable access, servicing or removal of any water heater.

10. The temperature pressure relief valve drain line from each water heater can terminate at a common

tundish (funnel) with a visible air break at each drain discharge point (refer to the diagram on page 25

and to “Relief Drain Line” on page 21).

Refer to the diagrams on pages 25 to 27 for installation and plant layout details.

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Rheem 50 Manuel de service Page 24