Richmond RMTGHRH111DVLN User Manual

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AP18733 REV. 3.2.17

INSTALL THE CONDENSATE DRAIN

GAS PIPING

DANGER

Common Vented water heaters must be direct vented, with an exhaust vent and intake air pipe vented to the outdoors. DO NOT power vent

Common Vented water heaters! Doing so will result in property damage, severe personal injury, or death.

NOTE: This drawing is meant only to demonstrate system venting. The installer is responsible for all equipment and detailing required by local

codes. For sidewall applications, terminate the outlet on the exterior wall at least 12" above the ground, or as required by local building codes. In

areas of high snowfall, protect both sidewall and roof vent terminations from blockage by installing at least 12" above the maximum anticipated

snowfall accumulation.

Figure 17 – Condensate Detail

Table 14 – Natural Gas Delivery Capacity – Corrugated Stainless Steel Pipe – Refer to ANSI Z223.1 – National Fuel Gas Code, Latest

Edition

WARNING

FIRE AND/OR EXPLOSION HAZARD

To avoid serious injury or death, the gas line installation and the gas line inlet pressure test must be done by a licensed professional.

Always match the water heater with the type of gas supplied to the unit (natural gas or LP gas). This water heater must be converted into propane

operation unless specically manufactured for use with propane. Follow Gas Conversion Manual instructions (separate document). Propane ready

water heaters have the sufx “LP” after the model serial number.

Make sure the gas line pressures are within normal limits. Pressures outside normal limits can result in poor performance and hazardous

operating conditions.

This water heater must be converted into propane operation unless it is specically manufactured to operate on propane. Propane-ready water

heaters have the sufx “LP” after the model serial number. Failure to ensure the water heater is set to operate on the provided gas supply could

result in property damage, personal injury, or death.

1. Gas Pipe Sizing

This information is for reference use only. Refer to gas pipe manufacturer specications for actual delivery capacity. The DOE standard for

Natural Gas is 1100 BTU/ft

. Contact the local gas supplier for actual BTU/ft

rating.

2. Natural Gas Pipe Sizing

The following tables list maximum capacity of pipe in cubic feet of gas per hour for gas pressures of 11" (27.9 cm) or less and a pressure

drop of 0.5 inches (0.12 kPa) water column, based on a 0.60 specic gravity for natural gas.

▪ A. GAS PIPE SIZING TABLES

Maximum Natural Gas Delivery Capacity – Length of Corrugated Stainless Steel Pipe in Feet

Pipe

size

Cubic Feet per Hour (0.60 Specic Gravity, 0.5 WC [0.12 kPa] Pressure Drop)

10 20 30 40 50 60 80 100 150 200

½" (1.2 cm) 82 58 47 41 37 37 29 26 20 18

¾" (1.9 cm) 192 137 112 97 87 80 69 62 48 44

1" (2.5 cm) 383 269 218 188 168 153 132 118 91 82

1 ¼" (3.1 cm) 639 456 374 325 292 267 232 208 171 148

1 ½" (3.8 cm) 1260 888 723 625 559 509 440 393 320 277

2" (5 cm) 2930 2080 1700 1470 1320 1200 1040 933 762 661

Condensate piping to oor drain

Condensate piping with pump

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Richmond RMTGHRH111DVLN Encore 11 GPM 199,900 BTU Tankless Natural Gas Water Heater

User Manual - Page 40