Raypak 018306 RP-180 (B Ti-180) Titanium Indirect Heat Exchanger, 185,000 BTU, 1-1/2" Pool x 1-1/4" Boiler NPT

The RP-180 (B Ti-180 in the manual) is a compact shell-and-tube heat exchanger that heats a pool or spa with hot water from a boiler or other heat source, keeping the two water circuits apart. It does not make heat on its own. This is the titanium version, which Raypak offers for salt water and heavily chlorinated pools; Raypak allows up to 6,000 ppm salt and 3,000 ppm total dissolved solids.

• Nominal capacity based on a 140 degrees F difference between the incoming heating water and the pool water
• Heat transfer area 4.7 sq ft
• Pool connections 1-1/2 in. NPT; boiler connections 1-1/4 in. NPT
• Shell diameter 4-1/16 in. (103 mm); length 409 mm
• Pool-side flow 20 to 50 GPM, with 1.5 to 9.5 ft of head loss
• Heating-side flow 20 to 30 GPM, with 1.0 to 2.0 ft of head loss
• Design rating for the titanium models: 150 PSI on both tube side and shell side, 406 degrees F

Not included: the operating thermostat, high limit and flow switch. Raypak requires all three and they are supplied separately.

Warranty: Raypak limited warranty, 1 year parts and labor when installed with a pool or spa by a licensed installer in the contiguous 48 states.

Installation notes: Raypak calls for counter-flow piping, a thermostat on the pool inlet set no higher than 104 degrees F, a second control that limits the outlet to 140 degrees F, and a flow switch in the pool line. Do not exceed the maximum flow rates. Where pool flow is higher or varies, Raypak shows a bypass line with a 2 lb spring check valve and a manual valve. Chemical feeders and salt chlorine generators go downstream of the exchanger with an anti-siphon valve. Free chlorine must not go above 5 ppm. System design and installation are for a qualified installer and must meet local codes.